# 스트롱스트롱 vs Routine Interval Timer

The clearest difference is in-app purchases: 스트롱스트롱 at none against Routine Interval Timer's 3. 스트롱스트롱 also leads on update cadence (every 5 days vs every 2 weeks) and iOS requirement (13.0 vs 16.1). On price, ads and device support there is nothing between them.

Both are free to download. Routine Interval Timer sells 3 in-app purchases, starting at $0.99 per month. 스트롱스트롱 asks for nothing beyond the download.

스트롱스트롱 ships an update every 5 days, Routine Interval Timer every 2 weeks. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 스트롱스트롱 | Routine Interval Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 5 days** | Every 2 weeks |
| Size | 26 MB | 73 MB |
| Requires iOS | **13.0** | 16.1 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [BYEONG JUN KIM](https://appshunter.io/developer/1778629016) | [sang woon kim](https://appshunter.io/developer/1879128626) |

## What reviewers say

### 스트롱스트롱

[App page](https://appshunter.io/ios/app/id6758891060)

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

**In-app purchases:** none


### Routine Interval Timer

[App page](https://appshunter.io/ios/app/routine-interval-timer-ddang/id6768160515)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads – Monthly | $0.99 | per month |
| Lifetime Ad Removal 30% Off | $10.49 | one-time |
| Lifetime Ad Removal | $14.99 | one-time |


## Frequently asked questions

### Is 스트롱스트롱 free?

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

### Is Routine Interval Timer free?

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

### Do 스트롱스트롱 or Routine Interval Timer have ads?

Both 스트롱스트롱 and Routine Interval Timer show ads.

### Which is updated more often, 스트롱스트롱 or Routine Interval Timer?

스트롱스트롱 ships an update every 5 days, and Routine Interval Timer every 2 weeks. Most recently, 스트롱스트롱 was updated on October 10, 2026 and Routine Interval Timer on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*