# Formulus Free vs ODE

Formulus Free and ODE are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Formulus Free ships an update every 6 weeks, ODE every 5 weeks. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Formulus Free | ODE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/formulus-free/id309681718/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 81.1% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | Ad-supported | — |
| Size | 12 MB | 41 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Daniel Byon](https://appshunter.io/developer/309681721) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## What reviewers say

### Formulus Free

[App page](https://appshunter.io/ios/app/formulus-free/id309681718)

Access a comprehensive collection of essential math formulas for high school and college calculus students. Quickly find the formulas you need without flipping through textbooks or searching online.

**Highlights:** Calculus formula collection, Algebra and Geometry formulas, Derivatives, Integrals, Limits, Trigonometry, Vectors

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

**In-app purchases:** none

**What reviewers like**

- 👍 Excellent organization and easy navigation
- 🚀 Quick and convenient formula lookup
- 📚 Comprehensive coverage of calculus and math formulas
- 💰 Free app with extensive content
- 🎓 Great study and review tool for students

**What reviewers complain about**

- 🐛 Frequent crashes and freezing issues
- 📱 Poor compatibility with larger iPhone screens
- ❌ Some formulas contain errors or typos
- 🔍 Missing several important formulas and topics
- 📊 No interactive features or worked examples

**Reported bugs**

- App crashes on startup after updates
- Freezing and lag issues during use
- Compatibility issues with larger iPhone screens
- Incorrect cross product entry formula
- Error in Simpson's rule integral approximation

**Requested features**

- Add practice problems and worked examples
- Include inverse trigonometric functions
- Add 3D shapes and geometry formulas
- Implement search functionality for quick formula finding
- Add graphing and calculation capabilities


### ODE

[App page](https://appshunter.io/ios/app/ode-solver-integrator/id1619296705)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Formulus Free free?

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

### Is ODE free?

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

### Do Formulus Free or ODE have ads?

Both Formulus Free and ODE show ads.

### Which is updated more often, Formulus Free or ODE?

Formulus Free ships an update every 6 weeks, and ODE every 5 weeks. Most recently, Formulus Free was updated on October 7, 2026 and ODE on October 12, 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.*