# SEMA3 vs Deep Work & Focus

The clearest difference is in-app purchases: SEMA3 at none against Deep Work & Focus's 3. Deep Work & Focus's advantage is update cadence (every 4 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Deep Work & Focus sells 3 in-app purchases, starting at $4.99 per month. SEMA3 asks for nothing beyond the download.

SEMA3 ships an update every 2 months, Deep Work & Focus every 4 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | SEMA3 | Deep Work & Focus |
| --- | --- | --- |
| 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 4 days** |
| Monetization | Free | — |
| Size | 38 MB | 125 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Richard Sinnott](https://appshunter.io/developer/1080236817) | [Rohan Agarwal](https://appshunter.io/developer/6810572228) |

## 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


### Deep Work & Focus

[App page](https://appshunter.io/ios/app/deep-work-and-focus-observatory/id6810572225)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Annual | $29.99 | per year |
| Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is SEMA3 free?

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

### Is Deep Work & Focus free?

Deep Work & Focus is free to download, with in-app purchases available.

### Do SEMA3 or Deep Work & Focus have ads?

Neither SEMA3 nor Deep Work & Focus shows ads.

### Which is updated more often, SEMA3 or Deep Work & Focus?

SEMA3 ships an update every 2 months, and Deep Work & Focus every 4 days. Most recently, SEMA3 was updated on October 29, 2026 and Deep Work & Focus on October 29, 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.*