SEMA3 vs meos | share private notes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SEMA3
Design and conduct smartphone-based survey research with this comprehensive software suite. It offers tools for creating and deploying ecological momentary assessments directly on mobile devices.
- Design survey research
- Conduct smartphone surveys
- Ecological momentary assessment
- Mobile survey deployment
- Research software suite
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SEMA (Smartphone Ecological Momentary Assessment) is a suite of software for designing and conducting smartphone-based survey research For more information, please visit https://sema3.com/
meos | share private notes
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Your friends. Not your followers. meos is a private messenger and notebook for the people you know. No ads. No strangers. No phone number. Meet in person and scan once to connect. After that, chat, call and share whenever you like. Strangers can't message request you. Your notes, photos and voice live on your phone. Messages to friends are end-to-end encrypted. Back up when you choose: one encrypted file you control. Saved items cluster together by similiarly automatically. Search what you saved. Type what you remember across notes, photos and messages. Use meos on a computer by scanning a QR code (no logins). Your phone stays in charge; close the tab and the session ends. Optional usage stats help us improve meos. They are off by default in the EU and UK, and you can turn them on or off in Privacy. Crash reports stay on so we can fix bugs. We never sell your data. Privacy policy: https://meos.do/docview:about:privacy For parents: https://meos.do/docview:about:parents For ages 13 and over.
Screenshots
Verdict
The clearest difference is in-app purchases: SEMA3 at none against meos | share private notes's 4. meos | share private notes's advantage is update cadence (every 2 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. meos | share private notes sells 4 in-app purchases, starting at $0.99 per 7 days. SEMA3 asks for nothing beyond the download.
SEMA3 ships an update every 2 months, meos | share private notes every 2 days. Both last shipped on October 24, 2026.
| Parameter | SEMA3 | meos | share private notes |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (8 ratings) — better | — |
| Positive reviews | 40.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 38 MB | 159 MB |
| Age rating | 4+ | 12+ |
| Developer | Richard Sinnott | meos labs |
In-app purchases
SEMA3
No in-app purchases
meos | share private notes
- Element$0.997 Days
- Plus$29.991 Month
- Ultra$89.991 Month
- Thought Flow Boost$4.49
Questions
Is SEMA3 free?
Is meos | share private notes free?
Do SEMA3 or meos | share private notes have ads?
Which is updated more often, SEMA3 or meos | share private notes?
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