# ReadTool vs Env Charging

The clearest difference is update cadence: Env Charging at every 2 months against ReadTool's every 24 months. ReadTool's advantage is iOS requirement (13.0 vs 15.6). 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.

ReadTool ships an update every 24 months, Env Charging every 2 months. The most recent releases landed on September 22, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | ReadTool | Env Charging |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 2 months** |
| Size | 19 MB | 86 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [FAMEINK PTE. LTD.](https://appshunter.io/developer/1746028804) | [Envision Charging LLC](https://appshunter.io/developer/1805156232) |

## What reviewers say

### ReadTool

[App page](https://appshunter.io/ios/app/readtool-offline-reader/id6451404740)

**Features:** Vision Pro support

**In-app purchases:** none


### Env Charging

[App page](https://appshunter.io/ios/app/env-charging/id6743937449)

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

**In-app purchases:** none


## Frequently asked questions

### Is ReadTool free?

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

### Is Env Charging free?

Env Charging is free to download, with no in-app purchases.

### Do ReadTool or Env Charging have ads?

Neither ReadTool nor Env Charging shows ads.

### Which is updated more often, ReadTool or Env Charging?

ReadTool ships an update every 24 months, and Env Charging every 2 months. Most recently, ReadTool was updated on September 22, 2026 and Env Charging on October 5, 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.*