# A Third Ear vs Kioku

The clearest difference is in-app purchases: Kioku at none against A Third Ear's 4. Kioku also leads on update cadence (every 2 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. A Third Ear sells 4 in-app purchases, starting at $4.99 per year. Kioku asks for nothing beyond the download.

A Third Ear ships an update fortnightly, Kioku every 2 days. The most recent releases landed on October 25, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | A Third Ear | Kioku |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 816 MB | 51 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MESS Software Technologies LLC](https://appshunter.io/developer/1824898162) | [Kai Kang](https://appshunter.io/developer/1757164832) |

## What reviewers say

### A Third Ear

[App page](https://appshunter.io/ios/app/a-third-ear/id6753905938)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A ThirdEar Annual Sub | $4.99 | per year |
| Small Tip | $0.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |


### Kioku

[App page](https://appshunter.io/ios/app/kioku-private-second-brain/id6762234661)

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

**In-app purchases:** none


## Frequently asked questions

### Is A Third Ear free?

A Third Ear is free to download, with in-app purchases available.

### Is Kioku free?

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

### Do A Third Ear or Kioku have ads?

Neither A Third Ear nor Kioku shows ads.

### Which is updated more often, A Third Ear or Kioku?

A Third Ear ships an update fortnightly, and Kioku every 2 days. Most recently, A Third Ear was updated on October 25, 2026 and Kioku on September 29, 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.*