# Jeyso vs Dev Notes++

The clearest difference is in-app purchases: Jeyso at none against Dev Notes++'s 3. Jeyso also leads on iOS requirement (17.0 vs 26.0). Dev Notes++'s advantage is update cadence (every 2 days vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Dev Notes++ sells 3 in-app purchases, starting at $3.99 per month. Jeyso asks for nothing beyond the download.

Jeyso ships an update monthly, Dev Notes++ every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Jeyso | Dev Notes++ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Size | 5 MB | 3 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Umit UZ](https://appshunter.io/developer/1842858860) | [Sylvain Lafrance](https://appshunter.io/developer/1197090441) |

## What reviewers say

### Jeyso

[App page](https://appshunter.io/ios/app/jeyso-json-diff-and-formatter/id6758353863)

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

**In-app purchases:** none


### Dev Notes++

[App page](https://appshunter.io/ios/app/dev-notes-plus-plus/id6762881892)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dev Notes - Monthly | $3.99 | per month |
| Dev Notes - Yearly Subscription | $24.99 | per year |
| Dev Notes - Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is Jeyso free?

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

### Is Dev Notes++ free?

Dev Notes++ is free to download, with in-app purchases available.

### Do Jeyso or Dev Notes++ have ads?

Neither Jeyso nor Dev Notes++ shows ads.

### Which is updated more often, Jeyso or Dev Notes++?

Jeyso ships an update monthly, and Dev Notes++ every 2 days. Most recently, Jeyso was updated on October 31, 2026 and Dev Notes++ on October 31, 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.*