# shelfs vs OTOKAI

The clearest difference is update cadence: OTOKAI at weekly against shelfs's fortnightly. OTOKAI also leads on iOS requirement (15.5 vs 18.6). On price, review sentiment, 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.

shelfs ships an update fortnightly, OTOKAI weekly. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | shelfs | OTOKAI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free | Free |
| Size | 7 MB | 93 MB |
| Requires iOS | 18.6 | **15.5** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Smart Engineering](https://appshunter.io/developer/544232740) | [Amadeus Code Inc.](https://appshunter.io/developer/802869982) |

## What reviewers say

### shelfs

[App page](https://appshunter.io/ios/app/shelfs/id6446165591)

Listen to community radio programs up to 7 days after they air. Manage your favorite shows in playlists that automatically update with the latest episodes. Enjoy local radio content on your schedule.

**Highlights:** 7-day catch-up playback, Playlist management, Automatic episode updates, Cross-search by program, station, genre, Background playback, Resume playback

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

**In-app purchases:** none


### OTOKAI

[App page](https://appshunter.io/ios/app/otokai/id6499198233)

This app transforms music listening into an engaging brain activity. Create unique music-photo or music-video combinations and share them with friends and family in a private social network. It's designed to promote cognitive health through enjoyable musical experiences.

**Highlights:** AI-powered music generation, Combine music with photos/videos, Private social network for sharing, Cognitive function exercises, Music analysis and comparison, Daily brain health routine

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

**In-app purchases:** none


## Frequently asked questions

### Is shelfs free?

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

### Is OTOKAI free?

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

### Do shelfs or OTOKAI have ads?

Neither shelfs nor OTOKAI shows ads.

### Which is updated more often, shelfs or OTOKAI?

shelfs ships an update fortnightly, and OTOKAI weekly. Most recently, shelfs was updated on October 11, 2026 and OTOKAI 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.*