# Daytum vs Self

The clearest difference is rating: Self at 5.0 against Daytum's 4.5. Self also leads on in-app purchases (none vs 2). Daytum's advantage is ratings volume (12 vs 2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Daytum sells 2 in-app purchases, starting at $3.99 per month. Self asks for nothing beyond the download.

Self holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Daytum has 12 ratings behind it against 2, so its average is the more settled of the two.

Daytum ships an update every 2 months, Self every 6 weeks. The most recent releases landed on July 18, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Daytum | Self |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (12 ratings)](https://appshunter.io/ios/app/daytum/id352646537/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/self-e/id1527728955/reviews)** |
| Number of ratings | **12** | 2 |
| Positive reviews | 16.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 19 MB |
| Requires iOS | **14.0** | 14.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Daytum](https://appshunter.io/developer/352646540) | [Brown University Computing & Information Services](https://appshunter.io/developer/816491717) |

## What reviewers say

### Daytum

[App page](https://appshunter.io/ios/app/daytum/id352646537)

This app allows users to collect, categorize, and visualize everyday data. Create custom charts and graphs to gain insights from your tracked information. Organize data into detailed records with flexible entry formats and attributes.

**Highlights:** Collect and categorize everyday data, Create custom charts and graphs, Flexible data entry format, Group data into categories, Add detailed text and numeric attributes, Build pages to display insights

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Daytum Plus | $3.99 | per month |
| Daytum Plus | $23.99 | per year |

**What reviewers like**

- 📊 Simple and elegant interface for data tracking
- ⚡ Quick data entry process
- 📈 Good charting and visualization capabilities
- 🎯 Versatile tracking for various use cases
- 👨‍💻 Responsive developer who implements user suggestions

**What reviewers complain about**

- 🐛 Frequent and persistent crashes
- 💾 Data loss and corruption issues
- ❌ Poor user interface/navigation experience
- 🔐 Privacy features locked behind paywall
- 📱 Compatibility issues with older iOS versions

**Reported bugs**

- App crashes when editing entry dates/times
- App crashes when adding entries with past dates
- Frequent 'Unable to Save' error messages
- Data entries disappear randomly
- Duplicate entries created on save

**Requested features**

- In-app documentation and user instructions
- Native iOS user authentication without web redirect
- Additional graph types (scatter plot, bar chart, cumulative)
- Ability to specify units for data entries
- Multiple data fields per entry


### Self

[App page](https://appshunter.io/ios/app/self-e/id1527728955)

This app helps you conduct self-experiments to understand the impact of behavioral changes on your health, wellness, and productivity. It provides tools to set up trials, track outcomes, and gain personalized insights through automated analysis and daily reminders.

**Highlights:** Conduct self-experiments, Track behavioral outcomes, Gain personalized insights, Automated statistical analysis, Daily check-in reminders, Data-driven self-improvement

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Daytum free?

Daytum is free to download, with in-app purchases available.

### Is Self free?

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

### Which has better reviews, Daytum or Self?

Self is rated higher. Daytum averages 4.5 out of 5 from 12 ratings, while Self averages 5.0 from 2 ratings.

### Do Daytum or Self have ads?

Neither Daytum nor Self shows ads.

### Which is updated more often, Daytum or Self?

Daytum ships an update every 2 months, and Self every 6 weeks. Most recently, Daytum was updated on July 18, 2026 and Self on June 11, 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.*