# Zen ESS vs ESL assistant

The clearest difference is update cadence: Zen ESS at fortnightly against ESL assistant's every 4 months. ESL assistant's advantage is iOS requirement (12.0 vs 15.0). On price, ads, 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.

Zen ESS ships an update fortnightly, ESL assistant every 4 months. The most recent releases landed on October 11, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Zen ESS | ESL assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Size | 206 MB | 22 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zen exim Pvt Ltd](https://appshunter.io/developer/995150047) | [Yaliang Software Development Co., Ltd.](https://appshunter.io/developer/1104844863) |

## What reviewers say

### Zen ESS

[App page](https://appshunter.io/ios/app/zen-ess/id1519017640)

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

**In-app purchases:** none


### ESL assistant

[App page](https://appshunter.io/ios/app/esl-assistant/id1565463349)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Zen ESS free?

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

### Is ESL assistant free?

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

### Do Zen ESS or ESL assistant have ads?

Neither Zen ESS nor ESL assistant shows ads.

### Which is updated more often, Zen ESS or ESL assistant?

Zen ESS ships an update fortnightly, and ESL assistant every 4 months. Most recently, Zen ESS was updated on October 11, 2026 and ESL assistant on September 10, 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.*