# Pre vs SignalLearning

The clearest difference is price: Pre at Free against SignalLearning's $0.99. SignalLearning's advantage is in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

Pre is free to download; SignalLearning costs $0.99 up front. Pre sells 1 in-app purchase, starting at $4.99 per month. SignalLearning asks for nothing beyond the download.

Pre ships an update every 31 months, SignalLearning every 19 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Pre | SignalLearning |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/signallearning/id1446742949/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 19 months** |
| Monetization | — | Paid |
| Size | 296 MB | 5 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Math Galaxy](https://appshunter.io/developer/500490521) | [domesticusdevelop](https://appshunter.io/developer/373834594) |

## What reviewers say

### Pre

[App page](https://appshunter.io/ios/app/pre-algebra-fundamentals/id551027794)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PreAlgebra - Math Galaxy | $4.99 | per month |


### SignalLearning

[App page](https://appshunter.io/ios/app/signallearning/id1446742949)

Learn the modern semaphore alphabet with this app. It presents 26 letters and 10 numbers, designed to make memorization easy and provide a testing mechanism for your knowledge.

**Highlights:** Modern semaphore alphabet, 26 letters and 10 numbers, Learning aid, Memorization testing, Visual signal presentation

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

**In-app purchases:** none


## Frequently asked questions

### Is Pre free?

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

### Is SignalLearning free?

SignalLearning costs $0.99, with no in-app purchases.

### Do Pre or SignalLearning have ads?

Neither Pre nor SignalLearning shows ads.

### Which is updated more often, Pre or SignalLearning?

Pre ships an update every 31 months, and SignalLearning every 19 months. Most recently, Pre was updated on October 24, 2026 and SignalLearning 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.*