# Maxima Control vs PolyInvert

The clearest difference is in-app purchases: Maxima Control at none against PolyInvert's 1. Maxima Control also leads on ads (none vs shown) and iOS requirement (11.0 vs 17.0). PolyInvert's advantage is update cadence (daily vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. PolyInvert sells 1 one-off in-app purchase. Maxima Control asks for nothing beyond the download.

Maxima Control ships an update every 3 weeks, PolyInvert daily. The most recent releases landed on October 1, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Maxima Control | PolyInvert |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 34 MB | 8 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Enrico Ripalti](https://appshunter.io/developer/1530955038) | [ADAM MICHAEL OGDEN](https://appshunter.io/developer/1854648813) |

## What reviewers say

### Maxima Control

[App page](https://appshunter.io/ios/app/maxima-control/id1530955036)

**In-app purchases:** none


### PolyInvert

[App page](https://appshunter.io/ios/app/polyinvert/id6755578020)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Maxima Control free?

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

### Is PolyInvert free?

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

### Do Maxima Control or PolyInvert have ads?

PolyInvert shows ads; Maxima Control does not.

### Which is updated more often, Maxima Control or PolyInvert?

Maxima Control ships an update every 3 weeks, and PolyInvert daily. Most recently, Maxima Control was updated on October 1, 2026 and PolyInvert on September 19, 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.*