# Math Formulas vs Retaining walls

The clearest difference is update cadence: Retaining walls at fortnightly against Math Formulas's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Math Formulas costs $0.99 and Retaining walls $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Math Formulas ships an update monthly, Retaining walls fortnightly. The most recent releases landed on September 28, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Math Formulas | Retaining walls |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[4.1 (11 ratings)](https://appshunter.io/ios/app/math-formulas-ref-guide/id423545644/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 67.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | — |
| Size | 18 MB | 4 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Oddrobo Software AB](https://appshunter.io/developer/423545647) | [Fourth Element Energy Pty Ltd](https://appshunter.io/developer/1652667540) |

## What reviewers say

### Math Formulas

[App page](https://appshunter.io/ios/app/math-formulas-ref-guide/id423545644)

Access over 100 high school level math formulas covering algebra, geometry, calculus, trigonometry, probability, and statistics. Includes examples for clarity and a search function to quickly find needed information. Ideal for students, teachers, and math enthusiasts.

**Highlights:** 100+ math formulas, Algebra, geometry, calculus, trig, Probability and statistics, Formulas with examples, Powerful search function, Favorite formulas

**Features:** macOS Compatibility, 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 Math Formulas free?

Math Formulas costs $0.99, with no in-app purchases.

### Is Retaining walls free?

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

### Do Math Formulas or Retaining walls have ads?

Neither Math Formulas nor Retaining walls shows ads.

### Which is updated more often, Math Formulas or Retaining walls?

Math Formulas ships an update monthly, and Retaining walls fortnightly. Most recently, Math Formulas was updated on September 28, 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.*