Simple Memo vs Captioo
Same Name, Different Apps
If you search "Captio" on the App Store, both Captioo and Simple Memo may appear. The three apps are all different. Captioo (808 inc.) is free with ads and feature-rich. Simple Memo is a focused, independent app rebuilt around "type and email yourself in one tap" — 0.4s launch, one-tap send, AES-GCM on-device encryption, zero server storage, and offline Outbox auto-resend.
Background: Captio, Captioo, and Simple Memo Are Three Different Apps
Comparison Table: Simple Memo vs Captioo
| Feature | Simple Memo | Captioo |
|---|---|---|
| Vendor | YURIKA, K.K. (Japan) | 808 inc. |
| Relation to Captio | Unrelated (independent) | Unrelated (independent) |
| Launch Speed | 0.4s (type immediately) | Standard |
| Send Speed | one-tap (Cloudflare Workers) | Standard |
| Ads | None | Yes (free version) |
| Image Sending | Text-focused by design | Yes |
| Widgets | Lock-screen widget | Yes |
| Offline Support | Outbox auto-resend | See App Store |
| On-Device Encryption | AES-GCM | See App Store |
| Server Storage | No memo body stored | See App Store |
| Free Tier | 3 sends/day, ad-free | Unlimited with ads |
| Premium | Premium $2.99/mo (unlimited, ad-free) | See App Store |
| Bilingual | Japanese / English | See App Store |
4 Key Differences
-
1
How "Free" Differs: Ads vs Send Cap
Captioo is free with no feature gates but shows ads. Simple Memo is ad-free even on the free plan, with a 3-sends-per-day cap instead. Decide based on whether you'd rather see ads in your "type and send" flow, or limit yourself to 3 sends per day. -
2
Feature Direction: Multimedia vs Text-Focused
Captioo includes multimedia features such as image sending. Simple Memo is intentionally limited to text-only memo email, with "no growing feature surface" as a design principle. If you prioritize "send as fast as possible with zero extra choices," text-focused fits better. -
3
Send Infrastructure: Standard vs Cloudflare Workers Relay
Simple Memo relays memos through Cloudflare Workers without permanently storing memo content on any server. The on-device queue is encrypted with AES-GCM. For Captioo's send infrastructure, please consult its App Store and official site listings. This is the starting point if you want to compare privacy posture. -
4
Positioning: Both Are Independent Apps
Neither app claims to be "Captio's official successor." Simple Memo's former "Captio-style" name only indicated that it inherits Captio's one-tap email workflow — it is not endorsed by or derived from Captio's original developer (Boonbits / Tupil). Captioo is also independent. Beware of same-name confusion.
Who Should Choose Which?
- Want the fastest re-creation of Captio's one-tap send
- Refuse to see any ads
- Need on-device encryption (AES-GCM)
- Don't want memo content stored on any server
- Need offline reliability with auto-resend on reconnect
- Are fine with 3 sends/day free, or willing to pay for unlimited
- Want to send media beyond text (images, etc.)
- Tolerate ads in exchange for fully free usage
- Need unlimited sends from day one without paying
- Find Simple Memo's "text-only" stance too limiting
- Prefer a feature-rich memo-sending app
FAQ
Are Captioo and Captio the same app?
No. Despite differing by only one letter ("o" vs "oo"), Captioo and Captio are separate apps. Captio (one O) was made by Boonbits / Tupil in the Netherlands and was removed from the App Store in October 2024. Captioo (two Os) is an unrelated app from 808 inc. and is currently available on the App Store.
Is Simple Memo related to Captioo?
No. Simple Memo - for Obsidian (formerly "Simple Memo - Captio-style") is an independent app developed by YURIKA, K.K. and has no capital, development, or operational relationship with Captioo (808 inc.). The former "Captio-style" name indicated that Simple Memo inherits Captio's one-tap memo-to-email workflow; it is not an officially endorsed successor.
Which app should I choose when "Captio" returns multiple apps in the App Store?
It depends on what you want. Captio itself ended service in October 2024 and is no longer downloadable. If you want the closest reproduction of Captio's "type, one-tap, email" workflow, Simple Memo offers 0.4s launch, one-tap send, AES-GCM encryption, and offline Outbox auto-resend. If you want feature-rich memo sending (images, widgets) for free, Captioo is an option.
Does Captioo show ads?
Per public App Store information, Captioo is free in exchange for showing ads. Simple Memo shows zero ads even on the free plan. Simple Memo prioritizes a clean send flow with nothing extra in the way.
Which app can I use for free long-term?
Both can be used free indefinitely, but the meaning of "free" differs. Captioo is free with no feature gates but ad-supported. Simple Memo is ad-free with a 3-sends-per-day cap; Premium ($2.99/month) unlocks unlimited sends. Pick Captioo if ads are tolerable, or Simple Memo if you want zero ads.
Are there privacy design differences?
Simple Memo relays memos through Cloudflare Workers without permanently storing memo content on any server. The on-device queue is encrypted with AES-GCM. For Captioo's privacy design, please consult its App Store and official site listings. As a general note, apps that include ad SDKs may transmit data for tracking purposes.
Related Pages
References
- Captio (c. 2011-2024). App Store listing. Boonbits / Tupil.
- Captioo vs Simple Memo (Deep Dive) — Simple Memo blog
- Why Captio Was Discontinued — Simple Memo blog
- Captio Alternative + Migration Guide — Simple Memo