# i vs EyeSound Vocal

The clearest difference is update cadence: EyeSound Vocal at every 3 weeks against i's every 9 months. i's advantage is iOS requirement (15.6 vs 17.0). 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.

i ships an update every 9 months, EyeSound Vocal every 3 weeks. The most recent releases landed on October 25, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | i | EyeSound Vocal |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Size | 12 MB | 3 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CO-LUCK ENTERPRISE CO., LTD](https://appshunter.io/developer/1251782804) | [keith house](https://appshunter.io/developer/1728464247) |

## What reviewers say

### i

[App page](https://appshunter.io/ios/app/i-btpsensor/id1506874966)

**Features:** macOS Compatibility

**In-app purchases:** none


### EyeSound Vocal

[App page](https://appshunter.io/ios/app/eyesound-vocal/id6476980675)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is i free?

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

### Is EyeSound Vocal free?

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

### Do i or EyeSound Vocal have ads?

Neither i nor EyeSound Vocal shows ads.

### Which is updated more often, i or EyeSound Vocal?

i ships an update every 9 months, and EyeSound Vocal every 3 weeks. Most recently, i was updated on October 25, 2026 and EyeSound Vocal on October 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*