# Okey Defteri vs 101SUM

The clearest difference is update cadence: 101SUM at every 2 days against Okey Defteri's every 2 weeks. 101SUM also leads on iOS requirement (13.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Okey Defteri ships an update every 2 weeks, 101SUM every 2 days. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Okey Defteri | 101SUM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 34 MB | 23 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mithat Ozgun](https://appshunter.io/developer/1844466233) | [Bertan Balaban](https://appshunter.io/developer/1827216117) |

## What reviewers say

### Okey Defteri

[App page](https://appshunter.io/ios/app/okey-defteri/id6753695900)

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

**In-app purchases:** none


### 101SUM

[App page](https://appshunter.io/ios/app/101sum/id6755593613)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Okey Defteri free?

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

### Is 101SUM free?

101SUM is free to download, with no in-app purchases.

### Do Okey Defteri or 101SUM have ads?

Neither Okey Defteri nor 101SUM shows ads.

### Which is updated more often, Okey Defteri or 101SUM?

Okey Defteri ships an update every 2 weeks, and 101SUM every 2 days. Most recently, Okey Defteri was updated on October 13, 2026 and 101SUM on October 7, 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.*