# Formulas +, your 4 collections vs iWortarten

The clearest difference is in-app purchases: iWortarten at none against Formulas +, your 4 collections's 2. iWortarten also leads on price ($1.99 vs $3.99). Formulas +, your 4 collections's advantage is update cadence (every 4 months vs every 11 months) and review sentiment (38% vs 25%). On ads, monetization model, device support and iOS requirement there is nothing between them.

Formulas +, your 4 collections costs $3.99 and iWortarten $1.99 up front. Formulas +, your 4 collections sells 2 one-off in-app purchases. iWortarten asks for nothing beyond the download.

Formulas +, your 4 collections ships an update every 4 months, iWortarten every 11 months. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Formulas +, your 4 collections | iWortarten |
| --- | --- | --- |
| Price | $3.99 | **$1.99** |
| Positive reviews | **38.5% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | Paid | Paid |
| Size | 27 MB | 13 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [app-solutions.de](https://appshunter.io/developer/550462608) | [lernklick](https://appshunter.io/developer/303776339) |

## What reviewers say

### 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 |


### iWortarten

[App page](https://appshunter.io/ios/app/iwortarten/id590268261)

Learn and practice the five parts of speech through interactive exercises. Developed by teachers and tested with students, this app offers a focused, educational experience without distractions. It provides immediate feedback and helpful tools to reinforce learning.

**Highlights:** Action-oriented learning of parts of speech, Developed and tested by educators, No in-app purchases or ads, Step-by-step learning path, Learning and test modes with scoring, Helpful tools like hint and repeat buttons, Immediate feedback on errors

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

**In-app purchases:** none


## Frequently asked questions

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

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

### Is iWortarten free?

iWortarten costs $1.99, with no in-app purchases.

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

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

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

Formulas +, your 4 collections ships an update every 4 months, and iWortarten every 11 months. Most recently, Formulas +, your 4 collections was updated on October 14, 2026 and iWortarten on October 10, 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.*