# StudyDay vs K

The clearest difference is device support: K at 3 against StudyDay's 1. K also leads on iOS requirement (15.5 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

StudyDay ships an update fortnightly, K every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | StudyDay | K |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 6 MB | 64 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jinyoung Lee](https://appshunter.io/developer/1250427645) | [Mooncheon Song](https://appshunter.io/developer/625976926) |

## What reviewers say

### StudyDay

[App page](https://appshunter.io/ios/app/studyday-pomodoro-timer/id6772432314)

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

**In-app purchases:** none


### K

[App page](https://appshunter.io/ios/app/k-story-trail/id6783686903)

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

**In-app purchases:** none


## Frequently asked questions

### Is StudyDay free?

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

### Is K free?

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

### Do StudyDay or K have ads?

Both StudyDay and K show ads.

### Which is updated more often, StudyDay or K?

StudyDay ships an update fortnightly, and K every 3 weeks. Most recently, StudyDay was updated on October 23, 2026 and K on October 24, 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.*