# E vs 1ISL Challenge

The clearest difference is in-app purchases: 1ISL Challenge at none against E's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. E sells 1 one-off in-app purchase. 1ISL Challenge asks for nothing beyond the download.

E ships an update every 3 days, 1ISL Challenge every 2 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | E | 1ISL Challenge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Size | 148 MB | 33 MB |
| Requires iOS | 16.2 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vivek Tiwari](https://appshunter.io/developer/1631820648) | [1EQ Edutech Private Limited](https://appshunter.io/developer/1711167252) |

## What reviewers say

### E

[App page](https://appshunter.io/ios/app/e-academy/id6472275830)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EacademyApp | $19.99 | one-time |


### 1ISL Challenge

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is E free?

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

### Is 1ISL Challenge free?

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

### Do E or 1ISL Challenge have ads?

Neither E nor 1ISL Challenge shows ads.

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

E ships an update every 3 days, and 1ISL Challenge every 2 days. Most recently, E was updated on October 27, 2026 and 1ISL Challenge on October 28, 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.*