# Math Ref Lite vs iTurbo

The clearest difference is in-app purchases: iTurbo at none against Math Ref Lite's 5. iTurbo also leads on rating (5.0 vs 4.6). Math Ref Lite's advantage is update cadence (every 2 months vs every 54 months) and ratings volume (7 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Math Ref Lite sells 5 one-off in-app purchases. iTurbo asks for nothing beyond the download.

iTurbo holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Math Ref Lite has 7 ratings behind it against 1, so its average is the more settled of the two.

Math Ref Lite ships an update every 2 months, iTurbo every 54 months. The most recent releases landed on October 4, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Math Ref Lite | iTurbo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (7 ratings)](https://appshunter.io/ios/app/math-ref-lite/id312756358/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iturbo/id314368331/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 61.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 54 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 65 MB | 2 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Happy Maau Studios, LLC](https://appshunter.io/developer/301384060) | [ManneTroll Solutions](https://appshunter.io/developer/313743954) |

## What reviewers say

### Math Ref Lite

[App page](https://appshunter.io/ios/app/math-ref-lite/id312756358)

Access a sample of over 700 essential math formulas, figures, tips, and examples across various subjects. This educational tool is ideal for students, teachers, and professionals needing quick math references.

**Highlights:** Over 700 math formulas, figures, and examples, Tools from Algebra to Physics, Search functionality, Print support for equations, Editable notes, Multiple math categories

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Full Unlock | $1.99 | one-time |
| Great Tip | $2.99 | one-time |
| Awesome Tip | $4.99 | one-time |
| Amazing Tip | $9.99 | one-time |

**What reviewers like**

- 👍 Great reference app
- 👍 Handy for homework
- 👍 Useful for students
- 👍 Comprehensive information
- 👍 Easy to use

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Not working after updates
- 🐛 Incompatible with older devices
- 🐛 Poor definitions/errors
- 🐛 Lacks examples

**Reported bugs**

- App not supported on iPhone 5
- App not compatible with iPad 4 after update
- App crashes on launch for iPad Air
- App crashes often
- Update not initiating

**Requested features**

- Add language option
- Include physics equations
- Add more examples
- Add a search function
- Option to copy formulas


### iTurbo

[App page](https://appshunter.io/ios/app/iturbo/id314368331)

This app simulates fluid dynamics by solving Navier-Stokes equations for 2D incompressible turbulence. It uses a direct numerical simulation method with Euler time stepping and Fourier space calculations for efficiency.

**Highlights:** Direct Numerical Simulation (DNS), Navier-Stokes equation solver, 2D incompressible turbulence, Euler time stepping, Fourier space calculations, Vorticity field transformation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Math Ref Lite free?

Math Ref Lite is free to download, with in-app purchases available.

### Is iTurbo free?

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

### Which has better reviews, Math Ref Lite or iTurbo?

iTurbo is rated higher. Math Ref Lite averages 4.6 out of 5 from 7 ratings, while iTurbo averages 5.0 from 1 ratings.

### Do Math Ref Lite or iTurbo have ads?

Neither Math Ref Lite nor iTurbo shows ads.

### Which is updated more often, Math Ref Lite or iTurbo?

Math Ref Lite ships an update every 2 months, and iTurbo every 54 months. Most recently, Math Ref Lite was updated on October 4, 2026 and iTurbo on September 29, 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.*