# 52/17 vs SCI

The clearest difference is in-app purchases: SCI at none against 52/17's 1. SCI also leads on update cadence (every 5 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 52/17 sells 1 one-off in-app purchase. SCI asks for nothing beyond the download.

52/17 ships an update every 6 weeks, SCI every 5 days. The most recent releases landed on June 5, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | 52/17 | SCI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 40 MB | 39 MB |
| Requires iOS | 13 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Vladislav Khaykov](https://appshunter.io/developer/1525508564) | [JINSPIRE](https://appshunter.io/developer/1862480659) |

## What reviewers say

### 52/17

[App page](https://appshunter.io/ios/app/5217/id1604356537)

This app uses the 52-minute work, 17-minute break method to enhance focus and productivity. It's designed to help users achieve deep concentration while ensuring adequate rest periods for better performance.

**Highlights:** 52-minute focus intervals, 17-minute rest periods, Deep focus enhancement, Mindful rest cycles, Balanced productivity

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Colors | $0.99 | one-time |


### SCI

[App page](https://appshunter.io/ios/app/sci-jin-connect/id6756719613)

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

**In-app purchases:** none


## Frequently asked questions

### Is 52/17 free?

52/17 is free to download, with in-app purchases available.

### Is SCI free?

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

### Do 52/17 or SCI have ads?

Neither 52/17 nor SCI shows ads.

### Which is updated more often, 52/17 or SCI?

52/17 ships an update every 6 weeks, and SCI every 5 days. Most recently, 52/17 was updated on June 5, 2026 and SCI on September 12, 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.*