# E Ink BT Solution vs ESL assistant

The clearest difference is update cadence: ESL assistant at every 4 months against E Ink BT Solution's every 9 months. 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.

E Ink BT Solution ships an update every 9 months, ESL assistant every 4 months. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | E Ink BT Solution | ESL assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 months** |
| Size | 1 MB | 22 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [E Ink Holdings Inc.](https://appshunter.io/developer/791464815) | [Yaliang Software Development Co., Ltd.](https://appshunter.io/developer/1104844863) |

## What reviewers say

### E Ink BT Solution

[App page](https://appshunter.io/ios/app/e-ink-bt-solution/id1474945368)

**Features:** macOS Compatibility

**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 E Ink BT Solution free?

E Ink BT Solution 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 E Ink BT Solution or ESL assistant have ads?

Neither E Ink BT Solution nor ESL assistant shows ads.

### Which is updated more often, E Ink BT Solution or ESL assistant?

E Ink BT Solution ships an update every 9 months, and ESL assistant every 4 months. Most recently, E Ink BT Solution was updated on September 24, 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.*