# iformula vs Formula Conversion

The clearest difference is in-app purchases: iformula at none against Formula Conversion's 1. iformula also leads on update cadence (every 2 months vs every 26 months). Formula Conversion's advantage is iOS requirement (14.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Formula Conversion sells 1 one-off in-app purchase. iformula asks for nothing beyond the download.

iformula ships an update every 2 months, Formula Conversion every 26 months. The most recent releases landed on October 13, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | iformula | Formula Conversion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/iformula/id325337275/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 65.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 26 months |
| Monetization | Free | — |
| Size | 59 MB | 2 MB |
| Requires iOS | 17.6 | **14.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tobias Werner](https://appshunter.io/developer/325337278) | [Janek Soomets](https://appshunter.io/developer/1315295062) |

## What reviewers say

### iformula

[App page](https://appshunter.io/ios/app/iformula/id325337275)

This app is a comprehensive math learning platform for students and professionals. It offers a vast library of over 1000 math equations and topics, along with features like search, note-taking, and bookmarking. It aims to eliminate the need for physical math textbooks.

**Highlights:** 1000+ math equations and topics, Full-featured search functionality, Note-taking system, Bookmarking for favorite equations, Dual language support (English & German), Dark mode support

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

**In-app purchases:** none


### Formula Conversion

[App page](https://appshunter.io/ios/app/formula-conversion/id1586539965)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade Formula Conversion | $3.99 | one-time |


## Frequently asked questions

### Is iformula free?

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

### Is Formula Conversion free?

Formula Conversion is free to download, with in-app purchases available.

### Do iformula or Formula Conversion have ads?

Neither iformula nor Formula Conversion shows ads.

### Which is updated more often, iformula or Formula Conversion?

iformula ships an update every 2 months, and Formula Conversion every 26 months. Most recently, iformula was updated on October 13, 2026 and Formula Conversion 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.*