# 3J iSmart vs Mentech power

The clearest difference is update cadence: Mentech power at every 6 months against 3J iSmart's every 26 months. 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.

3J iSmart ships an update every 26 months, Mentech power every 6 months. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | 3J iSmart | Mentech power |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 6 months** |
| Size | 187 MB | 168 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TLI INTERNATION PTY Ltd](https://appshunter.io/developer/1725279629) | [Dongguan Mentech Optical & Magnetic Co., Ltd](https://appshunter.io/developer/1649300157) |

## What reviewers say

### 3J iSmart

[App page](https://appshunter.io/ios/app/3j-ismart/id6475813294)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mentech power

[App page](https://appshunter.io/ios/app/mentech-power/id6476974811)

**In-app purchases:** none


## Frequently asked questions

### Is 3J iSmart free?

3J iSmart is free to download, with no in-app purchases.

### Is Mentech power free?

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

### Do 3J iSmart or Mentech power have ads?

Neither 3J iSmart nor Mentech power shows ads.

### Which is updated more often, 3J iSmart or Mentech power?

3J iSmart ships an update every 26 months, and Mentech power every 6 months. Most recently, 3J iSmart was updated on October 5, 2026 and Mentech power on September 30, 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.*