# Diffusion and osmosis vs Atomic Spectra

The clearest difference is price: Diffusion and osmosis at $0.99 against Atomic Spectra's $1.99. Diffusion and osmosis also leads on iOS requirement (12.0 vs 26.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Diffusion and osmosis costs $0.99 and Atomic Spectra $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Diffusion and osmosis ships an update every 30 months, Atomic Spectra every 19 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Diffusion and osmosis | Atomic Spectra |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/atomic-spectra/id6444901660/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 19 months** |
| Monetization | — | Paid |
| Size | 40 MB | 7 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Jim Haungs](https://appshunter.io/developer/1498282259) |

## What reviewers say

### Diffusion and osmosis

[App page](https://appshunter.io/ios/app/diffusion-and-osmosis/id1199769507)

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

**In-app purchases:** none


### Atomic Spectra

[App page](https://appshunter.io/ios/app/atomic-spectra/id6444901660)

This reference app provides detailed information on strong line atomic emission spectra within the visible range. Users can search for elements by name, symbol, or atomic number and inspect individual spectra lines. It offers interactive features to visualize and navigate spectral data.

**Highlights:** Visible range spectra (380-740nm), Search by element name, symbol, or atomic number, Sort by name, symbol, or spectra line count, Inspect individual spectra lines, Interactive spectrum visualization

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Diffusion and osmosis free?

Diffusion and osmosis costs $0.99, with no in-app purchases.

### Is Atomic Spectra free?

Atomic Spectra costs $1.99, with no in-app purchases.

### Do Diffusion and osmosis or Atomic Spectra have ads?

Neither Diffusion and osmosis nor Atomic Spectra shows ads.

### Which is updated more often, Diffusion and osmosis or Atomic Spectra?

Diffusion and osmosis ships an update every 30 months, and Atomic Spectra every 19 months. Most recently, Diffusion and osmosis was updated on October 26, 2026 and Atomic Spectra on October 27, 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.*