# 작심삼일 vs SIDO

The clearest difference is in-app purchases: 작심삼일 at none against SIDO's 2. 작심삼일 also leads on update cadence (every 2 days vs every 6 days) and iOS requirement (12.0 vs 17.0). SIDO's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. SIDO sells 2 in-app purchases, starting at $3.99 per month. 작심삼일 asks for nothing beyond the download.

작심삼일 ships an update every 2 days, SIDO every 6 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | 작심삼일 | SIDO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 6 days |
| Size | 45 MB | 70 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pathfinder, Incorporated](https://appshunter.io/developer/1688966386) | [AEJIN SEO](https://appshunter.io/developer/1896585301) |

## What reviewers say

### 작심삼일

[App page](https://appshunter.io/ios/app/id6757416865)

**Features:** macOS Compatibility

**In-app purchases:** none


### SIDO

[App page](https://appshunter.io/ios/app/sido/id6768559309)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SIDO Pro 월간 | $3.99 | per month |
| SIDO Pro 연간 | $29.99 | per year |


## Frequently asked questions

### Is 작심삼일 free?

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

### Is SIDO free?

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

### Do 작심삼일 or SIDO have ads?

작심삼일 shows ads; SIDO does not.

### Which is updated more often, 작심삼일 or SIDO?

작심삼일 ships an update every 2 days, and SIDO every 6 days. Most recently, 작심삼일 was updated on October 31, 2026 and SIDO on October 31, 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.*