# Maintenance.ON vs MetisAI

The clearest difference is update cadence: MetisAI at weekly against Maintenance.ON's every 3 weeks. MetisAI also leads on iOS requirement (15.1 vs 17.6). 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.

Maintenance.ON ships an update every 3 weeks, MetisAI weekly. Both last shipped on October 28, 2026.

## The numbers

| Metric | Maintenance.ON | MetisAI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 80 MB | 64 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HERRENKNECHT AG](https://appshunter.io/developer/1601421537) | [MetisAI, Inc.](https://appshunter.io/developer/1876671665) |

## What reviewers say

### Maintenance.ON

[App page](https://appshunter.io/ios/app/maintenanceon/id6746122546)

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

**In-app purchases:** none


### MetisAI

[App page](https://appshunter.io/ios/app/metisai/id6759071496)

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

**In-app purchases:** none


## Frequently asked questions

### Is Maintenance.ON free?

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

### Is MetisAI free?

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

### Do Maintenance.ON or MetisAI have ads?

Neither Maintenance.ON nor MetisAI shows ads.

### Which is updated more often, Maintenance.ON or MetisAI?

Maintenance.ON ships an update every 3 weeks, and MetisAI weekly. Most recently, Maintenance.ON was updated on October 28, 2026 and MetisAI on October 28, 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.*