# Primary Particle vs Amieeba

The clearest difference is in-app purchases: Primary Particle at none against Amieeba's 2. Primary Particle also leads on iOS requirement (12.0 vs 17.6). Amieeba's advantage is update cadence (every 9 days vs every 8 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Amieeba sells 2 in-app purchases, starting at $0.99 per month. Primary Particle asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Primary Particle against 5.0 for Amieeba. Both are backed by a comparable volume of ratings — 3 and 3 respectively.

Primary Particle ships an update every 8 months, Amieeba every 9 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Primary Particle | Amieeba |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/primary-particle/id886683283/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/amieeba-digital-squishy/id6757132639/reviews) |
| Number of ratings | 3 | 3 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 9 days** |
| Monetization | Paid | Paid |
| Size | 47 MB | 23 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Schmitt](https://appshunter.io/developer/585665935) | [Joseph Smith](https://appshunter.io/developer/1864781655) |

## What reviewers say

### Primary Particle

[App page](https://appshunter.io/ios/app/primary-particle/id886683283)

A fun puzzle game where players help a scientist stabilize particles in an experiment. Catch particles of the correct color to keep the experiment going and increase your score. Beware of tricky particles that appear as your skill level rises.

**Highlights:** Particle stabilization gameplay, Color-matching mechanic, Increasing difficulty, Score-based progression, Experiment simulation

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

**In-app purchases:** none


### Amieeba

[App page](https://appshunter.io/ios/app/amieeba-digital-squishy/id6757132639)

This app offers a calming and private digital experience, perfect for both children and adults seeking a mental break. It features beautiful physics, satisfying haptic feedback, and a unique visual "exhale" mechanic to help reduce anxiety and cultivate mindfulness.

**Highlights:** 100% Private, no data collection, Ad-free experience, Safe for all ages, Cultivates mindfulness, Fluid physics simulation, Satisfying haptic feedback, Visual 'digital exhale' mechanic

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| amieeba+ | $0.99 | per month |
| amieeba+ | $1.99 | per 7 days |


## Frequently asked questions

### Is Primary Particle free?

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

### Is Amieeba free?

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

### Which has better reviews, Primary Particle or Amieeba?

Primary Particle and Amieeba are both rated 5.0 out of 5 on the App Store, from 3 and 3 ratings respectively.

### Do Primary Particle or Amieeba have ads?

Neither Primary Particle nor Amieeba shows ads.

### Which is updated more often, Primary Particle or Amieeba?

Primary Particle ships an update every 8 months, and Amieeba every 9 days. Most recently, Primary Particle was updated on October 24, 2026 and Amieeba on October 7, 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.*