# iformula vs Formulas +, your 4 collections

The clearest difference is price: iformula at Free against Formulas +, your 4 collections's $3.99. iformula also leads on in-app purchases (none vs 2) and review sentiment (69% vs 38%). Formulas +, your 4 collections's advantage is iOS requirement (12.0 vs 17.6). On ads and device support there is nothing between them.

iformula is free to download; Formulas +, your 4 collections costs $3.99 up front. Formulas +, your 4 collections sells 2 one-off in-app purchases. iformula asks for nothing beyond the download.

iformula ships an update every 2 months, Formulas +, your 4 collections every 4 months. The most recent releases landed on June 10, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | iformula | Formulas +, your 4 collections |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/iformula/id325337275/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **69.2% of reviews** | 38.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 59 MB | 27 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tobias Werner](https://appshunter.io/developer/325337278) | [app-solutions.de](https://appshunter.io/developer/550462608) |

## 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

**In-app purchases:** none


### Formulas +, your 4 collections

[App page](https://appshunter.io/ios/app/formulas-plus-your-4-collections/id550462605)

This app consolidates essential formulas for mathematics, physics, chemistry, and technical subjects into a single, easy-to-use application. It features an intelligent search function and provides clear explanations and graphics to aid understanding.

**Highlights:** Consolidated formulas for multiple subjects, Intelligent search function, Explanations and graphics, Calculation function (In-App Purchase), User suggestion feature

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basics Pack | $0.99 | one-time |
| Geometry/Stereometry Pack 1 | $0.99 | one-time |


## Frequently asked questions

### Is iformula free?

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

### Is Formulas +, your 4 collections free?

Formulas +, your 4 collections costs $3.99, and also offers in-app purchases.

### Do iformula or Formulas +, your 4 collections have ads?

Neither iformula nor Formulas +, your 4 collections shows ads.

### Which is updated more often, iformula or Formulas +, your 4 collections?

iformula ships an update every 2 months, and Formulas +, your 4 collections every 4 months. Most recently, iformula was updated on June 10, 2026 and Formulas +, your 4 collections on September 21, 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.*