# TK Smart Battery vs solar

The clearest difference is iOS requirement: TK Smart Battery at 9.0 against solar's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TK Smart Battery ships an update every 6 weeks, solar every 2 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TK Smart Battery | solar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Size | 30 MB | 50 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [应刚 郑](https://appshunter.io/developer/1446858821) | [Solar Mobile](https://appshunter.io/developer/1893516940) |

## What reviewers say

### TK Smart Battery

[App page](https://appshunter.io/ios/app/tk-smart-battery/id1562610645)

**Features:** macOS Compatibility

**In-app purchases:** none


### solar

[App page](https://appshunter.io/ios/app/solar-mobile/id6762241341)

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

**In-app purchases:** none


## Frequently asked questions

### Is TK Smart Battery free?

TK Smart Battery is free to download, with no in-app purchases.

### Is solar free?

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

### Do TK Smart Battery or solar have ads?

Neither TK Smart Battery nor solar shows ads.

### Which is updated more often, TK Smart Battery or solar?

TK Smart Battery ships an update every 6 weeks, and solar every 2 months. Most recently, TK Smart Battery was updated on October 27, 2026 and solar on October 25, 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.*