# BatteryEvo vs Permit

The clearest difference is in-app purchases: BatteryEvo at none against Permit's 1. BatteryEvo also leads on device support (3 vs 1) and iOS requirement (11.0 vs 17.6). On price, update cadence and ads there is nothing between them.

Both are free to download. Permit sells 1 one-off in-app purchase. BatteryEvo asks for nothing beyond the download.

BatteryEvo ships an update every 3 weeks, Permit monthly. The most recent releases landed on September 20, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | BatteryEvo | Permit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (10 ratings)](https://appshunter.io/ios/app/batteryevo/id6469973613/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 10.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | — |
| Size | 204 MB | 15 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Aipower Inc.](https://appshunter.io/developer/1712800965) | [Bo Zhao](https://appshunter.io/developer/1823102639) |

## What reviewers say

### BatteryEvo

[App page](https://appshunter.io/ios/app/batteryevo/id6469973613)

Monitor the status of your energy storage machine in real-time with this application. It offers intelligent data visualization through simple charts and displays historical data from multiple dimensions. The app is designed to be fast and consume minimal internet traffic.

**Highlights:** Real-time energy storage machine monitoring, Intelligent data visualization, Simple and easy-to-understand charts, Historical data display, Multi-dimensional data presentation, Low internet traffic consumption

**Features:** macOS Compatibility

**In-app purchases:** none


### Permit

[App page](https://appshunter.io/ios/app/permit-pilot/id6760631045)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full History | $3.99 | one-time |


## Frequently asked questions

### Is BatteryEvo free?

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

### Is Permit free?

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

### Do BatteryEvo or Permit have ads?

Neither BatteryEvo nor Permit shows ads.

### Which is updated more often, BatteryEvo or Permit?

BatteryEvo ships an update every 3 weeks, and Permit monthly. Most recently, BatteryEvo was updated on September 20, 2026 and Permit on September 21, 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.*