# HaiLun弹唱 vs Feel Sync

The clearest difference is update cadence: HaiLun弹唱 at fortnightly against Feel Sync's every 2 months. 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.

HaiLun弹唱 ships an update fortnightly, Feel Sync every 2 months. The most recent releases landed on October 28, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | HaiLun弹唱 | Feel Sync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | — | Free |
| Size | 58 MB | 165 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [HAILUN PIANO CO., LTD.](https://appshunter.io/developer/1104870330) | [CASIO COMPUTER CO., LTD.](https://appshunter.io/developer/456569836) |

## What reviewers say

### HaiLun弹唱

[App page](https://appshunter.io/ios/app/hailun/id6743887761)

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

**In-app purchases:** none


### Feel Sync

[App page](https://appshunter.io/ios/app/feel-sync/id6752929886)

This music app enhances keyboard playing by syncing your performance with built-in or imported songs. It offers real-time harmonic feedback and lyric display for an immersive musical experience, even for beginners. Enjoy a curated selection of tracks or play along to your own audio files.

**Highlights:** Syncs with keyboard for real-time playing, Includes 70 built-in popular songs, Import and play along with local audio files, Lyric display for singing along, Intuitive and easy-to-use interface

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

**In-app purchases:** none


## Frequently asked questions

### Is HaiLun弹唱 free?

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

### Is Feel Sync free?

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

### Do HaiLun弹唱 or Feel Sync have ads?

Neither HaiLun弹唱 nor Feel Sync shows ads.

### Which is updated more often, HaiLun弹唱 or Feel Sync?

HaiLun弹唱 ships an update fortnightly, and Feel Sync every 2 months. Most recently, HaiLun弹唱 was updated on October 28, 2026 and Feel Sync on November 4, 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.*