# POSRI vs Ring Protein

The clearest difference is in-app purchases: POSRI at none against Ring Protein's 1. POSRI also leads on iOS requirement (15.6 vs 17.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Ring Protein sells 1 one-off in-app purchase. POSRI asks for nothing beyond the download.

POSRI ships an update weekly, Ring Protein every 9 days. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | POSRI | Ring Protein |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Size | 149 MB | 7 MB |
| Requires iOS | **15.6** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [KODOMOTACHINO KODOMOTACHINO KODOMOTACHINOTAMENI, N.P.O.](https://appshunter.io/developer/1286768172) | [TAKUMA YANO](https://appshunter.io/developer/1869479039) |

## What reviewers say

### POSRI

[App page](https://appshunter.io/ios/app/posri/id1638877149)

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

**In-app purchases:** none


### Ring Protein

[App page](https://appshunter.io/ios/app/ring-protein/id6757891962)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro機能をアンロック | $2.99 | one-time |


## Frequently asked questions

### Is POSRI free?

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

### Is Ring Protein free?

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

### Do POSRI or Ring Protein have ads?

Neither POSRI nor Ring Protein shows ads.

### Which is updated more often, POSRI or Ring Protein?

POSRI ships an update weekly, and Ring Protein every 9 days. Most recently, POSRI was updated on October 7, 2026 and Ring Protein on October 25, 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.*