# Atomic Spectra vs Bayesian P

The clearest difference is price: Bayesian P at Free against Atomic Spectra's $1.99. Bayesian P also leads on update cadence (monthly vs every 19 months) and ratings volume (3 vs 1). Atomic Spectra's advantage is device support (4 vs 1). On rating, review sentiment, ads and in-app purchases there is nothing between them.

Bayesian P is free to download; Atomic Spectra costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Atomic Spectra against 5.0 for Bayesian P. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Atomic Spectra ships an update every 19 months, Bayesian P monthly. The most recent releases landed on September 30, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Atomic Spectra | Bayesian P |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/atomic-spectra/id6444901660/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/bayesian-p-value-interpreter/id6753958115/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 7 MB | 7 MB |
| Requires iOS | 26.0 | **18.4** |
| Devices | **iPhone, iPad, Mac, Apple TV** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jim Haungs](https://appshunter.io/developer/1498282259) | [Samuel Kaplan](https://appshunter.io/developer/1825010639) |

## What reviewers say

### 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


### Bayesian P

[App page](https://appshunter.io/ios/app/bayesian-p-value-interpreter/id6753958115)

This app helps interpret p-values from clinical trials by incorporating prior probabilities and Bayesian inference. It provides realistic interpretations of reported p-values, aiding in understanding the likelihood of experimental outcomes.

**Highlights:** Interpret p-values with prior probabilities, Bayesian inference for scientific expectations, Calculate probability of clinical trial outcomes, Realistic interpretation of reported p-values, Explanations and examples of Bayesian concepts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Atomic Spectra free?

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

### Is Bayesian P free?

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

### Which has better reviews, Atomic Spectra or Bayesian P?

Atomic Spectra and Bayesian P are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Atomic Spectra or Bayesian P have ads?

Neither Atomic Spectra nor Bayesian P shows ads.

### Which is updated more often, Atomic Spectra or Bayesian P?

Atomic Spectra ships an update every 19 months, and Bayesian P monthly. Most recently, Atomic Spectra was updated on September 30, 2026 and Bayesian P on October 9, 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.*