# Sollatek AON vs ESP

The clearest difference is in-app purchases: Sollatek AON at none against ESP's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ESP sells 1 one-off in-app purchase. Sollatek AON asks for nothing beyond the download.

## The numbers

| Metric | Sollatek AON | ESP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 42 MB | 1 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Sollatek Ltd](https://appshunter.io/developer/1714648889) | [Wuhan FireFrog Technology Co., Ltd.](https://appshunter.io/developer/917083159) |

## What reviewers say

### Sollatek AON

[App page](https://appshunter.io/ios/app/sollatek-aon/id6743437006)

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

**In-app purchases:** none


### ESP

[App page](https://appshunter.io/ios/app/esp-airlink/id6756355176)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| a cup of coffee | $0.99 | one-time |


## Frequently asked questions

### Is Sollatek AON free?

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

### Is ESP free?

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

### Do Sollatek AON or ESP have ads?

Neither Sollatek AON nor ESP shows ads.

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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.*