# Dose Timer vs Rin Sky

The clearest difference is update cadence: Rin Sky at every 4 days against Dose Timer's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Dose Timer sells 4 one-off in-app purchases and Rin Sky sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Dose Timer ships an update every 3 weeks, Rin Sky every 4 days. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Dose Timer | Rin Sky |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 2 MB | 33 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyuki Kako](https://appshunter.io/developer/1581721316) | [nobutaka kawasaki](https://appshunter.io/developer/6797384563) |

## What reviewers say

### Dose Timer

[App page](https://appshunter.io/ios/app/dose-timer-med-countdown/id6790408245)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee | $2.99 | one-time |
| Medicine Pass | $2.99 | one-time |
| Good Burger | $9.99 | one-time |
| Dinner | $29.99 | one-time |


### Rin Sky

[App page](https://appshunter.io/ios/app/rin-sky-vertigo-tracker/id6799015322)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DizzyLog Pro (one-time) | $19.99 | one-time |


## Frequently asked questions

### Is Dose Timer free?

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

### Is Rin Sky free?

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

### Do Dose Timer or Rin Sky have ads?

Neither Dose Timer nor Rin Sky shows ads.

### Which is updated more often, Dose Timer or Rin Sky?

Dose Timer ships an update every 3 weeks, and Rin Sky every 4 days. Most recently, Dose Timer was updated on October 8, 2026 and Rin Sky on October 5, 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.*