# Jster vs Inside OESL

The clearest difference is iOS requirement: Jster at 13.0 against Inside OESL's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Jster ships an update every 2 weeks, Inside OESL fortnightly. The most recent releases landed on September 9, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Jster | Inside OESL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Size | 50 MB | 83 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [香港聚水潭科技有限公司](https://appshunter.io/developer/1704269407) | [ContiTech Vibration Control GmbH](https://appshunter.io/developer/6771672272) |

## What reviewers say

### Jster

[App page](https://appshunter.io/ios/app/jster/id1564620482)

**Features:** macOS Compatibility

**In-app purchases:** none


### Inside OESL

[App page](https://appshunter.io/ios/app/inside-oesl/id6749386272)

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

**In-app purchases:** none


## Frequently asked questions

### Is Jster free?

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

### Is Inside OESL free?

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

### Do Jster or Inside OESL have ads?

Neither Jster nor Inside OESL shows ads.

### Which is updated more often, Jster or Inside OESL?

Jster ships an update every 2 weeks, and Inside OESL fortnightly. Most recently, Jster was updated on September 9, 2026 and Inside OESL on September 26, 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.*