# ZeroPamine vs Rin

The clearest difference is in-app purchases: Rin at none against ZeroPamine's 2. Rin also leads on ads (none vs shown) and update cadence (every 3 days vs weekly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. ZeroPamine sells 2 one-off in-app purchases. Rin asks for nothing beyond the download.

ZeroPamine ships an update weekly, Rin every 3 days. The most recent releases landed on October 1, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | ZeroPamine | Rin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zeropamine-focus-timer/id6756612361/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 95 MB | 5 MB |
| Requires iOS | **16.2** | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Dong Seok Lee](https://appshunter.io/developer/1446240630) | [Yuka Kubo](https://appshunter.io/developer/1857610643) |

## What reviewers say

### ZeroPamine

[App page](https://appshunter.io/ios/app/zeropamine-focus-timer/id6756612361)

This app helps you stay focused using a Pomodoro timer with animated themes that evolve as you concentrate. It offers features for sorting focus time, saving routines, and tracking progress with detailed statistics. Start a dopamine detox and improve your productivity with this tool.

**Highlights:** Animated focus themes, Categorize focus time, Save routines and presets, Detailed statistics (daily, weekly, monthly, yearly), Lock screen timer, Cloud sync

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Campfire Theme - Cozy Fire | $1.99 | one-time |
| zeropamine pro | $9.99 | one-time |


### Rin

[App page](https://appshunter.io/ios/app/rin/id6800327709)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ZeroPamine free?

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

### Is Rin free?

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

### Do ZeroPamine or Rin have ads?

ZeroPamine shows ads; Rin does not.

### Which is updated more often, ZeroPamine or Rin?

ZeroPamine ships an update weekly, and Rin every 3 days. Most recently, ZeroPamine was updated on October 1, 2026 and Rin 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.*