Captio Alternative 2026: Email Capture Apps Compared

Name: Simple Memo - for Obsidian
Rating: 4.1 (27 reviews)
Author: AI ATAKA

Bottom Line: Inspired by Captio's Experience

Simple Memo keeps three familiar parts of the email-yourself workflow: instant input on launch, clear after send, and zero clutter. Email delivery uses Cloudflare Workers and the Resend API, both third-party services. The offline Outbox queues unsent memos for retry, and AES-GCM encrypts the Outbox and send history on your device. These features do not guarantee uninterrupted service or delivery.

Write

Input Screen on Launch

one-tap

Send Action

1 tap

To Send a Memo

AES-GCM

On-Device Encryption

What Happened to Captio? A Complete Timeline

Captio was one of the most popular "email yourself" apps on iOS, beloved by productivity enthusiasts for its dead-simple interface. Here is the full story of its rise and fall.

Around 2010 -- Launch

Captio launched on the iOS App Store as a minimalist "send to self" email app. Its premise was simple: open the app, type a thought, tap send. The memo goes straight to your inbox. No folders, no categories, no formatting toolbar. The app gained a devoted following among GTD practitioners, journalists, and anyone who used their inbox as a capture tool.

2014-2019 -- Peak Popularity

Captio was featured by major productivity blogs including Lifehacker, The Sweet Setup, and MacStories. It became a staple recommendation in "best productivity apps" roundups. The app operated on a one-time purchase model, making it accessible to almost everyone.

Around 2022 -- App Store Removal

In Captio's official farewell, Ben Lenarts says Captio had left the App Store two years before the October 2024 service shutdown. The cloud service continued for people who already had the app.

October 1, 2024 -- Cloud Service Discontinued

The official farewell announced October 1, 2024 as the end of Captio's cloud service. Lenarts explained that he could no longer dedicate the resources needed to ensure the app's stability and security.

After the Shutdown -- Finding an Alternative

The farewell suggests searching the App Store for apps that email a note to yourself. Previously delivered messages can still be accessed in the recipient inbox, subject to that email account's retention and availability.

Simple Memo -- An Independent Alternative

Simple Memo offers one-tap email capture, an offline Outbox, and on-device encryption. It is developed independently by YURIKA, K.K. and is not affiliated with or endorsed by Captio or its developer.

Source check: Captio's official farewell attributes the closure to the resources required for stability and security. It does not identify Gmail, OAuth, or a third-party email API policy change as the cause.

Why Captio Shut Down: What the Developer Said

The developer's farewell is the primary source for Captio's closure. It establishes the shutdown date and the maintenance constraint; it does not establish a specific API failure or a detailed financial cause.

1. Limited Resources for Maintenance

Ben Lenarts said that he could no longer devote the resources needed for Captio's stability and security. Captio's official farewell also notes that the cloud service was maintained for existing users after the app left the App Store. This is the stated reason for ending the service.

2. Avoid Inferring an Unconfirmed Technical Cause

The farewell does not blame Gmail, OAuth rules, API policy changes, or a particular pricing model. Those explanations should not be presented as established facts. When choosing an alternative, review its current features, privacy terms, delivery dependencies, and pricing; no business model can guarantee that a service will continue indefinitely.

3 Reasons to Choose Simple Memo as Your Captio Alternative

1. Same Feel, Instant Familiarity

Launch straight to the input screen, type a memo, then tap send. The input clears after sending. This keeps the familiar email-yourself workflow; setup and delivery behavior differ between apps.

2. Email Delivery Without Mailbox OAuth Setup

Simple Memo sends through Cloudflare Workers and the Resend API. You choose a destination email address without connecting that mailbox through OAuth. Cloudflare and Resend are third-party providers, so their availability and policies remain dependencies. Delivery also depends on the recipient email service.

3. Offline Support + On-device Encryption

Simple Memo stores queued memos and send history on your device with AES-GCM encryption. Its Outbox retries pending messages when connectivity returns. Captio also supported temporary offline storage, as documented on Tupil's product page; offline capture was not unique to Simple Memo.

How Simple Memo Handles Email Capture

Simple Memo is one option for the email-yourself workflow. This page is written by its developer. The features below describe how it works; they are not an independent ranking or a comparison of measured app speeds.

Capture and Delivery Are Separate

Simple Memo opens to text input and uses a preconfigured destination for one-tap sending. Launch time varies by device and app state; arrival in the inbox also depends on the network and email providers. A tap or a queued Outbox item is not proof of delivery. This page does not claim that Simple Memo is faster than the alternatives.

On-Device AES-GCM Encryption

AES-GCM protects the Outbox and send history stored on your device. Email delivery is a separate process using Cloudflare Workers and Resend, which process message content for delivery. On-device storage encryption does not make ordinary email end-to-end encrypted.

Offline-First Architecture

Captio could temporarily store notes on the device while offline, according to its developer's product page. Simple Memo also queues memos sent while offline locally, with on-device encryption and automatic retries when connectivity returns. Check delivery status for important notes: a queued memo is not yet a delivered email.

Email-Based Storage: Your Inbox as Your Archive

Like Captio, Simple Memo uses your email inbox as the storage layer. This is a deliberate design choice. Your memos are searchable through your email client, backed up by your email provider, and accessible from any device with email access. There is no proprietary database to export, no sync to configure, and no vendor lock-in. If you ever stop using Simple Memo, every memo you sent is still sitting in your email inbox, fully accessible.

Captio Alternatives: Workflow Comparison

The table includes Captio as a discontinued reference alongside Simple Memo, Note To Self Mail, Note to Email, Captioo and Apple Notes. Selected delivery and feature claims were checked against developer sources on September 6, 2026. No common-device timing test is presented here; “not verified” does not mean a feature is absent.

Feature	Simple Memo	Captio	Note To Self Mail	Note to Email	Captioo (808 inc.)	Apple Notes
Service Status	Active	Discontinued (Oct 2024)	Active	Active	Active (different vendor)	OS built-in
Send Infrastructure	Cloudflare + Resend	Not specified in farewell	Own email server or provider	Direct SMTP	Unknown	Apple Share Sheet
Setup	Email only	Email only	Connect your email account; provider-specific authentication	Email only	Email only	—
Offline Capture	Local Outbox with retry	Temporary on-device storage	Not verified here	Not verified here	Not verified here	Depends on note account and downloaded content
On-Device Memo Encryption	AES-GCM for Outbox and history; ordinary email is not E2E	Not verified here	Not verified here	Not verified here	Not verified here	Depends on account and note settings
Send History	In-app tracking	Delivered email in recipient inbox	Archive list	Not verified here	Not verified here	Not an email-send history
Multiple Recipients	1 (change in Settings; a new address is verified again)	Not verified here	Multiple addresses; check current plan limits	2	1	Unlimited
Attachments / Photos	Text-only (by design)	Photos and other attachments (per its old App Store listing)	Paid only	Multiple photos	Photos supported	Yes
Paste Support	Yes	Yes	Yes	No	Yes	Yes
Home Widget	Yes	Not verified here	Not verified here	Not verified here	Listed by developer	Yes
Dark Mode	Yes	Not verified here	Not verified here	Not verified here	Not verified here	Yes
Ads	None	None	None	None	Yes	None
Pricing	Free 3/day + $2.99/mo or $29.99/yr	One-time purchase	Free + paid features	Free	Free (ads)	Built-in
Platforms	iOS	iOS (removed)	iOS	iOS / Android	iOS	iOS / macOS / iPadOS

Choosing a workflow: Simple Memo sends to a destination address through Cloudflare and Resend. Note To Self Mail connects to your own email server or provider and offers multiple addresses, attachments and an archive; it is not limited to Gmail. Captioo is published by 808 inc., a different vendor from Captio. Check the current store listing and test delivery before choosing an app.

How to Switch from Captio to Simple Memo (5 Steps)

The migration from Captio to Simple Memo takes five steps. Since Captio was an email-sending app (not a storage app), there is no complex data migration involved. Here is the step-by-step process.

Download Simple Memo from the App Store -- Search "Simple Memo" or "Simple Memo - for Obsidian" in the App Store, or use the direct download link at the bottom of this page. The app is free to download, with a Free plan of 3 sends/day, with no time limit.
Set your destination email address -- Enter the same email address you used with Captio. This ensures your new memos land in the same inbox alongside your historical Captio memos, maintaining a seamless chronological timeline. Any email provider works -- Gmail, Outlook, Yahoo, iCloud, or corporate email.
Send your first test memo -- Type a quick test note and tap send. You should receive the email within seconds. Notice that the app auto-clears after sending, just like Captio. The keyboard is ready for your next thought immediately.
Add the home screen widget (optional) -- Add the Simple Memo widget (iOS 17 or later) to your Home Screen or Lock Screen. One tap opens the app; on iOS 26 or later with a supported device and language, it starts a voice memo right away. Long-press the Home Screen, add a widget, and choose Simple Memo (the labels vary by iOS version).
Explore Premium features (optional) -- Decide whether the Free plan (3 sends/day, with no time limit) or Premium ($2.99/month) fits your usage pattern. Premium unlocks unlimited sends and options such as saving only to Obsidian; send history is on the Free plan too. If you send a few memos a day, the Free plan may be enough.

Pro Tip: If you used Captio with a Gmail account, consider setting up a Gmail filter to automatically label memos from Simple Memo (sender address: noreply@mail.simplememofast.com). This way, your old Captio memos and new Simple Memo memos are easy to distinguish in search while still living in the same inbox.

Detailed Migration Guide for Captio Users

We address the key concerns when switching from Captio, covering data migration, workflow differences, and feature parity. The bottom line: switching takes little work, and you also get features such as the encrypted Outbox and send history.

Data Migration: Nothing to Do

The memos you sent through Captio were delivered to your email inbox. Captio was never a storage app -- it was a send-to-email app, so unless you deleted them, your memos are in your email, not in the app. This means there is no data migration step. Simply install Simple Memo, set the same destination email address you used with Captio, and you are done. New memos will land in the same inbox alongside your old Captio memos, maintaining a seamless chronological timeline. No export files, no import wizards, no data conversion -- just set your email and start writing.

Workflow Comparison: Capture, Queue and Delivery

Both Captio and Simple Memo use an open, type, send workflow. Captio supported temporary offline storage, according to its developer’s product page. Simple Memo has an encrypted local Outbox that retries sending when connectivity returns. The widget provides an entry point to capture. Check send history and your inbox to distinguish a saved draft, a queued memo and a delivered message.

Feature Parity + Upgrades

Simple Memo follows the familiar open, type, send workflow. Its features include an encrypted local Outbox with automatic retry, send history, widgets, and dark mode. You can set a destination such as Gmail, Outlook, iCloud, or a corporate email address. This does not imply that Captio was restricted to Gmail or that every Captio feature is reproduced.

Example Scenarios: Where Simple Memo Fits

Simple Memo is built for moments when you need to capture a thought before it disappears. Here are some situations where it fits.

🚋

Commute Capture

You are on the train and suddenly remember something important for tomorrow's meeting. Pull out your phone, open Simple Memo, type the thought and tap send. The memo is waiting in your inbox when you sit down at your desk. Even in the subway tunnel with no signal, the Outbox holds your memo and sends it automatically when you emerge. This was the original Captio use case.

🛒

Shopping Lists on the Go

Walking through the house, you notice you are running low on coffee filters, dish soap, and batteries. Instead of opening a full note app and navigating to a shopping list, just fire off three quick memos: "coffee filters", "dish soap", "batteries". Send each item as you notice it. When you arrive at the store, search "Simple Memo" in your email and you have your list. No app switching, no list management, no sync issues.

💡

Work Ideas and Meeting Notes

In a brainstorming session, a colleague mentions an interesting approach. You do not want to interrupt the flow by fumbling with a note app. Open Simple Memo, type a quick summary -- "Ask Sarah about the API rate limiting approach she mentioned" -- and send. The idea is captured, timestamped, and searchable in your work email. Process it later during your inbox review. It fits GTD, which separates capture from processing.

🏃

Exercise and Outdoor Activities

You are out for a jog and a brilliant idea strikes. Stop briefly, pull out your phone, type a few keywords into Simple Memo, and tap send. Keep the note brief and check the delivery status later. With the offline Outbox, this works even on trail runs with spotty cell coverage. When you get home, check your inbox for the idea, ready for elaboration.

📚

Reading and Research Capture

You are reading an article or book and come across a passage worth remembering. Open Simple Memo and type a quick quote or summary with the source. Send it. Later, when you sit down to write, search your email for the topic and find all your captured references organized chronologically. No need to switch to a bookmark app or highlighting tool.

😴

Late-Night Thoughts

It is 2 AM and you remember something you absolutely cannot forget by morning. If your iPhone is in dark mode, the app follows it, so the screen won't blast your eyes with light. Type your thought, send, put the phone down, go back to sleep. No need to navigate, create a new note, or choose a folder -- just type and send. Check your inbox in the morning.

Technical Specifications

Supported OS: iOS 16.0 or later (iPhone)
App Size: About 21 MB (App Store listing, checked October 1, 2026)
Send Method: Cloudflare Workers + Resend API (third-party delivery services)
Offline: Outbox architecture (AES-GCM encrypted local storage, automatic resend on reconnection)
Encryption: AES-GCM for the on-device Outbox and send history; memo text is processed in transit during email delivery
Widget: Home Screen and Lock Screen widget (iOS 17 or later; one tap starts a voice memo on iOS 26 or later with a supported device and language)
Dark Mode: Follows the iOS light or dark appearance
Free Plan: 3 sends/day (no time limit)
Premium: $2.99/month or $29.99/year (unlimited sends)
Email Providers: Works with any email provider: Gmail, Outlook, Yahoo Mail, iCloud, corporate, custom domain

Frequently Asked Questions

Why was Captio discontinued?

Captio's cloud service ended on October 1, 2024. In Captio's official farewell, Ben Lenarts says the app had left the App Store two years earlier and he could no longer devote the resources needed for stability and security. The announcement does not attribute the shutdown to Gmail, OAuth, or an email API policy change.

What is the best Captio alternative in 2026?

The right choice depends on your workflow. Simple Memo is an independent option for quick email capture, with an encrypted local Outbox and send history. Drafts offers customizable actions, while Apple Notes supports broader note organization. This page is written by Simple Memo's developer; Captio and its developer do not endorse it.

Can I migrate my Captio data to Simple Memo?

Simple Memo does not import Captio data (the two apps are independent), and you do not need it to: the memos Captio sent were delivered to your email inbox -- Captio was a sending app, not a storage app. Simply set the same email address in Simple Memo, and your new memos will appear alongside your old Captio memos in a seamless chronological timeline. No export, no import, no data conversion needed.

Will Simple Memo also shut down suddenly like Captio?

No app can guarantee indefinite availability. Simple Memo uses Cloudflare Workers and the Resend API, so it depends on third-party infrastructure. Its free and paid plans support different usage levels, but they do not guarantee future service continuity. Successfully delivered memos remain in your recipient inbox subject to that account's availability and retention; unsent Outbox items have not yet reached that inbox.

Does Simple Memo work with non-Gmail email addresses?

Yes. You can use a destination such as Gmail, Outlook, Yahoo Mail, iCloud Mail, a corporate address, or a custom domain. Simple Memo sends through Cloudflare Workers and the Resend API without requiring OAuth access to the destination mailbox. Delivery remains subject to the recipient provider's filtering and availability.

Is Simple Memo free to use?

Yes. The Free plan allows 3 sends per day, with no time limit -- no credit card required. For power users who send more than 3 memos per day, the Premium plan ($2.99/month or $29.99/year) unlocks unlimited sends and options such as saving only to Obsidian. Send history is on the Free plan too.

How does Simple Memo compare to Apple Notes or the Mail app?

Apple Notes supports organizing notes and sharing a copy through other apps. Mail lets you compose an email to yourself. Simple Memo opens to text input and sends to a preconfigured destination with one tap. These workflows suit different needs; this page does not provide a controlled timing comparison. Launch, composition and confirmed email arrival are different measurements.

Does Simple Memo support attachments or images?

Simple Memo is intentionally text-only (Captio, by contrast, could attach photos). This is a design choice: without attachments, the app stays focused on quick text capture. If you need to send images or files to yourself, Apple's built-in share sheet or a full email client is a better tool for that job.

Is there an Android version of Simple Memo?

Simple Memo is currently iOS-only, as Captio was. There is no Android version. For Android users looking for a similar "email yourself" experience, search Google Play for apps that email a note to yourself, or send a note from Google Keep through Gmail.

Related Pages

8 Best Email-Yourself Apps (2026) Note-to-Email Guide Captio Migration Guide iPhone Shortcuts Email Guide Captio Shutdown: Best Alternatives iOS Quick Capture Comparison Offline-First Note Apps Inbox Zero Workflow Tips Fastest Note App on iPhone Why Captio Was Discontinued When Note Apps Shut Down: Risks and Precautions Privacy Policy Terms of Service

References

[1] Ben Lenarts, "Captio End-of-Life Announcement," Captio's official farewell, service end date October 1, 2024; checked September 6, 2026.
[2] Cloudflare, "Workers documentation," developers.cloudflare.com.
[3] Resend, "Email API documentation," resend.com/docs.
[4] NIST, "Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode (GCM)," SP 800-38D, 2007.

About the Author

AI ATAKA is the creator of Simple Memo and a productivity enthusiast with a background in software engineering. After Captio was discontinued, he set out to build an independent alternative that preserved the quick email-capture workflow. Simple Memo is the result of that effort -- built for the "email yourself" workflow with third-party email delivery, on-device encryption, and an offline Outbox.

Disclosure: The author is the developer of Simple Memo. This comparison aims to be factual and helpful regardless of which app you choose. We include multiple alternatives so you can pick the best fit for your workflow. No controlled cross-app speed comparison is provided on this page. Developer documentation and store listings describe capabilities; they do not establish equal delivery performance or independent security verification.

Publisher: YURIKA, K.K. (株式会社ユリカ) / Press release: PR TIMES

Trademark & non-affiliation notice: This service and YURIKA, K.K. have no affiliation, sponsorship, endorsement, or partnership of any kind with Captio (developed by Tupil B.V.) or its co-founder Ben Lenarts. "Captio" and "Tupil" are trademarks of their respective owners. This page is provided as informational content for users searching for alternatives after Captio's shutdown and is not intended as a review of Captio itself.