# SEMA3 vs meos | share private notes

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.

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.

## The numbers

| Metric | SEMA3 | meos | share private notes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (8 ratings)](https://appshunter.io/ios/app/sema3/id1427120118/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 38 MB | 159 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Richard Sinnott](https://appshunter.io/developer/1080236817) | [meos labs](https://appshunter.io/developer/1836844201) |

## What reviewers say

### SEMA3

[App page](https://appshunter.io/ios/app/sema3/id1427120118)

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.

**Highlights:** Design survey research, Conduct smartphone surveys, Ecological momentary assessment, Mobile survey deployment, Research software suite

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### meos | share private notes

[App page](https://appshunter.io/ios/app/meos-share-private-notes/id6751792139)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Element | $0.99 | per 7 days |
| Plus | $29.99 | per month |
| Ultra | $89.99 | per month |
| Thought Flow Boost | $4.49 | one-time |


## Frequently asked questions

### Is SEMA3 free?

SEMA3 is free to download, with no in-app purchases.

### Is meos | share private notes free?

meos | share private notes is free to download, with in-app purchases available.

### Do SEMA3 or meos | share private notes have ads?

Neither SEMA3 nor meos | share private notes shows ads.

### Which is updated more often, SEMA3 or meos | share private notes?

SEMA3 ships an update every 2 months, and meos | share private notes every 2 days. Most recently, SEMA3 was updated on October 24, 2026 and meos | share private notes on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*