# Formulas +, your 4 collections vs SkySolve

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

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

## The numbers

| Metric | Formulas +, your 4 collections | SkySolve |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 38.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | Paid | — |
| Size | 27 MB | 2 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [app-solutions.de](https://appshunter.io/developer/550462608) | [Jonas Philipp Haru Andres Vetsch*](https://appshunter.io/developer/1761158569) |

## 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 |


### SkySolve

[App page](https://appshunter.io/ios/app/skysolve/id6743310165)

**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 SkySolve free?

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

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

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

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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.*