# Interactive Protist Explorer vs Equation Solver & Simplifier

The clearest difference is price: Equation Solver & Simplifier at Free against Interactive Protist Explorer's $1.99. Equation Solver & Simplifier also leads on update cadence (every 3 weeks vs every 4 months). Interactive Protist Explorer's advantage is in-app purchases (none vs 8) and iOS requirement (12.0 vs 15.0). On ads and device support there is nothing between them.

Equation Solver & Simplifier is free to download; Interactive Protist Explorer costs $1.99 up front. Equation Solver & Simplifier sells 8 one-off in-app purchases. Interactive Protist Explorer asks for nothing beyond the download.

Interactive Protist Explorer ships an update every 4 months, Equation Solver & Simplifier every 3 weeks. The most recent releases landed on September 23, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | Interactive Protist Explorer | Equation Solver & Simplifier |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.4 (10 ratings)](https://appshunter.io/ios/app/equation-solver-and-simplifier/id1500087226/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 64 MB | 182 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPad, Apple TV | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Interactive Protist Explorer

[App page](https://appshunter.io/ios/app/interactive-protist-explorer/id1270888856)

**Features:** macOS Compatibility

**In-app purchases:** none


### Equation Solver & Simplifier

[App page](https://appshunter.io/ios/app/equation-solver-and-simplifier/id1500087226)

This app helps you solve algebraic equations by showing every step of the simplification process. It can find the value of 'x' or the zeros of a function using a numeric algorithm after simplifying your input.

**Highlights:** Algebraic equation solving, Step-by-step simplification, Numeric algorithm for solutions, History function, Decimal input support, Constants and variables support

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |


## Frequently asked questions

### Is Interactive Protist Explorer free?

Interactive Protist Explorer costs $1.99, with no in-app purchases.

### Is Equation Solver & Simplifier free?

Equation Solver & Simplifier is free to download, with in-app purchases available.

### Do Interactive Protist Explorer or Equation Solver & Simplifier have ads?

Neither Interactive Protist Explorer nor Equation Solver & Simplifier shows ads.

### Which is updated more often, Interactive Protist Explorer or Equation Solver & Simplifier?

Interactive Protist Explorer ships an update every 4 months, and Equation Solver & Simplifier every 3 weeks. Most recently, Interactive Protist Explorer was updated on September 23, 2026 and Equation Solver & Simplifier on August 26, 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.*