# Steiner Tree vs Signals and Systems

The clearest difference is in-app purchases: Steiner Tree at none against Signals and Systems's 6. Steiner Tree also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). Signals and Systems's advantage is update cadence (every 5 weeks vs every 45 months). On price and ads there is nothing between them.

Both are free to download. Signals and Systems sells 6 in-app purchases, starting at $9.99 per month. Steiner Tree asks for nothing beyond the download.

Steiner Tree ships an update every 45 months, Signals and Systems every 5 weeks. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Steiner Tree | Signals and Systems |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 5 weeks** |
| Size | 1 MB | 18 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Reinhard MAENNER](https://appshunter.io/developer/578568275) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### Steiner Tree

[App page](https://appshunter.io/ios/app/steiner-tree/id590732192)

**Features:** macOS Compatibility

**In-app purchases:** none


### Signals and Systems

[App page](https://appshunter.io/ios/app/signals-and-systems/id6739804680)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 6 Months | $19.99 | per 6 months |
| 1 Year | $29.99 | per year |
| 1500 | $0.99 | one-time |
| 3500 | $1.99 | one-time |
| 9000 | $3.99 | one-time |


## Frequently asked questions

### Is Steiner Tree free?

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

### Is Signals and Systems free?

Signals and Systems is free to download, with in-app purchases available.

### Do Steiner Tree or Signals and Systems have ads?

Neither Steiner Tree nor Signals and Systems shows ads.

### Which is updated more often, Steiner Tree or Signals and Systems?

Steiner Tree ships an update every 45 months, and Signals and Systems every 5 weeks. Most recently, Steiner Tree was updated on October 19, 2026 and Signals and Systems on October 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.*