# Self vs postin

The clearest difference is in-app purchases: Self at none against postin's 3. Self also leads on device support (3 vs 1) and iOS requirement (15.0 vs 26.0). postin's advantage is update cadence (every 2 days vs every 2 weeks). On price and ads there is nothing between them.

Both are free to download. postin sells 3 in-app purchases, starting at $1.99 per month. Self asks for nothing beyond the download.

Self ships an update every 2 weeks, postin every 2 days. The most recent releases landed on October 16, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Self | postin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 84 MB | 47 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Yuki Shimazu](https://appshunter.io/developer/1690104673) | [keishi yokoi](https://appshunter.io/developer/1861661371) |

## What reviewers say

### Self

[App page](https://appshunter.io/ios/app/self-control-mate-tracker/id6759315555)

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

**In-app purchases:** none


### postin

[App page](https://appshunter.io/ios/app/postin-postcard-sns/id6794994524)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription Plan (Monthly) | $1.99 | per month |
| Annual Subscription | $19.99 | per year |
| 5 Stamps | $0.29 | one-time |


## Frequently asked questions

### Is Self free?

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

### Is postin free?

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

### Do Self or postin have ads?

Neither Self nor postin shows ads.

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

Self ships an update every 2 weeks, and postin every 2 days. Most recently, Self was updated on October 16, 2026 and postin on September 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.*