# eisonAI vs Private Diary Everyday

The clearest difference is update cadence: eisonAI at every 4 days against Private Diary Everyday's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. eisonAI sells 1 one-off in-app purchase and Private Diary Everyday sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

eisonAI ships an update every 4 days, Private Diary Everyday every 4 months. The most recent releases landed on September 8, 2026 and June 7, 2026 respectively.

## The numbers

| Metric | eisonAI | Private Diary Everyday |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 4 months |
| Size | 73 MB | 2 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [伟才 黄](https://appshunter.io/developer/1313606730) | [Nhat Linh Dang](https://appshunter.io/developer/1857899120) |

## What reviewers say

### eisonAI

[App page](https://appshunter.io/ios/app/eisonai/id6484502399)

**Features:** Safari Extension, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $14.99 | one-time |


### Private Diary Everyday

[App page](https://appshunter.io/ios/app/private-diary-everyday/id6756542291)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Access | $9.99 | per month |
| Yearly Pro Access | $39.99 | per year |


## Frequently asked questions

### Is eisonAI free?

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

### Is Private Diary Everyday free?

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

### Do eisonAI or Private Diary Everyday have ads?

Neither eisonAI nor Private Diary Everyday shows ads.

### Which is updated more often, eisonAI or Private Diary Everyday?

eisonAI ships an update every 4 days, and Private Diary Everyday every 4 months. Most recently, eisonAI was updated on September 8, 2026 and Private Diary Everyday on June 7, 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.*