# Brain AI Daily vs May Diary

The clearest difference is update cadence: May Diary at fortnightly against Brain AI Daily's every 2 months. Brain AI Daily's advantage is iOS requirement (15.1 vs 18.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Brain AI Daily sells 2 in-app purchases, starting at $3.99 per month and May Diary sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Brain AI Daily ships an update every 2 months, May Diary fortnightly. The most recent releases landed on October 14, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Brain AI Daily | May Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 38 MB | 12 MB |
| Requires iOS | **15.1** | 18.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Opencollar Technologies LLC](https://appshunter.io/developer/1817220168) | [PETR HAZUZA](https://appshunter.io/developer/1870810456) |

## What reviewers say

### Brain AI Daily

[App page](https://appshunter.io/ios/app/brain-ai-daily/id6748817557)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BrainMonthly | $3.99 | per month |
| Brain AI Credits | $1.99 | one-time |


### May Diary

[App page](https://appshunter.io/ios/app/may-diary/id6758090877)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me a Coffee | $0.99 | one-time |
| Support Development | $2.99 | one-time |
| Big Thank You | $4.99 | one-time |


## Frequently asked questions

### Is Brain AI Daily free?

Brain AI Daily is free to download, with in-app purchases available.

### Is May Diary free?

May Diary is free to download, with in-app purchases available.

### Do Brain AI Daily or May Diary have ads?

Neither Brain AI Daily nor May Diary shows ads.

### Which is updated more often, Brain AI Daily or May Diary?

Brain AI Daily ships an update every 2 months, and May Diary fortnightly. Most recently, Brain AI Daily was updated on October 14, 2026 and May Diary on October 25, 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.*