# Jetty Study vs 1ISL Challenge

The clearest difference is ads: 1ISL Challenge at none against Jetty Study's shown. 1ISL Challenge also leads on update cadence (every 2 days vs every 2 months). Jetty Study's advantage is iOS requirement (12.0 vs 15.1). On price, in-app purchases and device support there is nothing between them.

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

Jetty Study ships an update every 2 months, 1ISL Challenge every 2 days. The most recent releases landed on October 3, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Jetty Study | 1ISL Challenge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 43 MB | 33 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gurjeet Singh](https://appshunter.io/developer/1555022419) | [1EQ Edutech Private Limited](https://appshunter.io/developer/1711167252) |

## What reviewers say

### Jetty Study

[App page](https://appshunter.io/ios/app/jetty-study/id6473020073)

**Features:** macOS Compatibility

**In-app purchases:** none


### 1ISL Challenge

[App page](https://appshunter.io/ios/app/1isl-challenge/id6742008806)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Jetty Study free?

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

### Is 1ISL Challenge free?

1ISL Challenge is free to download, with no in-app purchases.

### Do Jetty Study or 1ISL Challenge have ads?

Jetty Study shows ads; 1ISL Challenge does not.

### Which is updated more often, Jetty Study or 1ISL Challenge?

Jetty Study ships an update every 2 months, and 1ISL Challenge every 2 days. Most recently, Jetty Study was updated on October 3, 2026 and 1ISL Challenge on September 30, 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.*