# AiBATROS InputApp vs PLAN4

The clearest difference is device support: PLAN4 at 3 against AiBATROS InputApp's 1. AiBATROS InputApp's advantage is iOS requirement (13.0 vs 15.5). 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.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | AiBATROS InputApp | PLAN4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Size | 92 MB | 20 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Aareon Planungs- und Bestandsentwicklungs GmbH](https://appshunter.io/developer/1527048809) | [PLAN4 Software GmbH](https://appshunter.io/developer/1548262679) |

## What reviewers say

### AiBATROS InputApp

[App page](https://appshunter.io/ios/app/aibatros-inputapp/id1433920857)

**Features:** Vision Pro support

**In-app purchases:** none


### PLAN4

[App page](https://appshunter.io/ios/app/plan4-gebaudecheck/id1485242041)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AiBATROS InputApp free?

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

### Is PLAN4 free?

PLAN4 is free to download, with no in-app purchases.

### Do AiBATROS InputApp or PLAN4 have ads?

Neither AiBATROS InputApp nor PLAN4 shows ads.

### Which is updated more often, AiBATROS InputApp or PLAN4?

AiBATROS InputApp ships an update every 3 months, and PLAN4 every 3 months. Most recently, AiBATROS InputApp was updated on October 25, 2026 and PLAN4 on October 20, 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.*