# Spirax Study App vs Retaining walls

The clearest difference is price: Spirax Study App at Free against Retaining walls's $0.99. Retaining walls's advantage is update cadence (fortnightly vs every 6 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Spirax Study App is free to download; Retaining walls costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Spirax Study App ships an update every 6 weeks, Retaining walls fortnightly. The most recent releases landed on September 23, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Spirax Study App | Retaining walls |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 214 MB | 4 MB |
| Requires iOS | 16.6 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ACCO Brands USA LLC](https://appshunter.io/developer/594765823) | [Fourth Element Energy Pty Ltd](https://appshunter.io/developer/1652667540) |

## What reviewers say

### Spirax Study App

[App page](https://appshunter.io/ios/app/spirax-study-app/id6461415063)

Transform handwritten notes into digital flashcards with this app. Simply scan specially designed paper, and your notes are converted for easy editing and organization by subject. Sync to cloud storage for access on any device.

**Highlights:** Scan handwritten notes, Create digital flashcards, Edit and customize flashcards, Organize by subject, Sync to Google Drive, Study anywhere, anytime

**Features:** Vision Pro support

**In-app purchases:** none


### Retaining walls

[App page](https://appshunter.io/ios/app/retaining-walls/id6469571321)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spirax Study App free?

Spirax Study App is free to download, with no in-app purchases.

### Is Retaining walls free?

Retaining walls costs $0.99, with no in-app purchases.

### Do Spirax Study App or Retaining walls have ads?

Neither Spirax Study App nor Retaining walls shows ads.

### Which is updated more often, Spirax Study App or Retaining walls?

Spirax Study App ships an update every 6 weeks, and Retaining walls fortnightly. Most recently, Spirax Study App was updated on September 23, 2026 and Retaining walls on September 15, 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.*