# Problem vs District 31 Pre

The clearest difference is update cadence: District 31 Pre at every 2 months against Problem's every 16 months. Problem's advantage is iOS requirement (13.0 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.

Problem ships an update every 16 months, District 31 Pre every 2 months. Both last shipped on November 7, 2026.

## The numbers

| Metric | Problem | District 31 Pre |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 2 months** |
| Size | 23 MB | 163 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EAS EducAide Software Inc](https://appshunter.io/developer/1552599701) | [Solved Education Consultancy, LLC](https://appshunter.io/developer/1506645558) |

## What reviewers say

### Problem

[App page](https://appshunter.io/ios/app/problem-attic-test-scanner/id1552599699)

**In-app purchases:** none


### District 31 Pre

[App page](https://appshunter.io/ios/app/district-31-pre-k-centers/id1612143145)

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

**In-app purchases:** none


## Frequently asked questions

### Is Problem free?

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

### Is District 31 Pre free?

District 31 Pre is free to download, with no in-app purchases.

### Do Problem or District 31 Pre have ads?

Neither Problem nor District 31 Pre shows ads.

### Which is updated more often, Problem or District 31 Pre?

Problem ships an update every 16 months, and District 31 Pre every 2 months. Most recently, Problem was updated on November 7, 2026 and District 31 Pre on November 7, 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.*