# TET LITHIUM vs InPower

The clearest difference is update cadence: InPower at fortnightly against TET LITHIUM's every 32 months. TET LITHIUM's advantage is iOS requirement (9.0 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.

TET LITHIUM ships an update every 32 months, InPower fortnightly. Both last shipped on October 27, 2026.

## The numbers

| Metric | TET LITHIUM | InPower |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Fortnightly** |
| Size | 7 MB | 31 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [宇文 钟](https://appshunter.io/developer/1541529609) | [Yanis Papismedov](https://appshunter.io/developer/1760224832) |

## What reviewers say

### TET LITHIUM

[App page](https://appshunter.io/ios/app/tet-lithium/id1542310415)

**Features:** macOS Compatibility

**In-app purchases:** none


### InPower

[App page](https://appshunter.io/ios/app/inpower/id6605939371)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TET LITHIUM free?

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

### Is InPower free?

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

### Do TET LITHIUM or InPower have ads?

Neither TET LITHIUM nor InPower shows ads.

### Which is updated more often, TET LITHIUM or InPower?

TET LITHIUM ships an update every 32 months, and InPower fortnightly. Most recently, TET LITHIUM was updated on October 27, 2026 and InPower on October 27, 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.*