# Simple Factors vs BioFlash

The clearest difference is price: BioFlash at Free against Simple Factors's $0.99. BioFlash also leads on update cadence (every 7 months vs every 20 months). Simple Factors's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

BioFlash is free to download; Simple Factors costs $0.99 up front. BioFlash sells 1 in-app purchase, starting at $9.99 per year. Simple Factors asks for nothing beyond the download.

Simple Factors ships an update every 20 months, BioFlash every 7 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Simple Factors | BioFlash |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.8 (5 ratings)](https://appshunter.io/ios/app/simple-factors/id1084119563/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 7 months** |
| Monetization | Paid | — |
| Size | 1 MB | 44 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Joseph Palmer](https://appshunter.io/developer/914507761) | [Gentiana Etemi](https://appshunter.io/developer/1883027493) |

## What reviewers say

### Simple Factors

[App page](https://appshunter.io/ios/app/simple-factors/id1084119563)

This app helps users understand numbers by providing their factors and checking for primality or divisibility. It offers a straightforward interface for quick calculations up to 10 trillion.

**Highlights:** Calculates factors of numbers, Checks for primality, Determines divisibility, Supports numbers up to 10 trillion, Simple, menu-free interface

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

**In-app purchases:** none


### BioFlash

[App page](https://appshunter.io/ios/app/bioflash-glossary/id6760253478)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BioFlash Premium | $9.99 | per year |


## Frequently asked questions

### Is Simple Factors free?

Simple Factors costs $0.99, with no in-app purchases.

### Is BioFlash free?

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

### Do Simple Factors or BioFlash have ads?

Neither Simple Factors nor BioFlash shows ads.

### Which is updated more often, Simple Factors or BioFlash?

Simple Factors ships an update every 20 months, and BioFlash every 7 months. Most recently, Simple Factors was updated on October 24, 2026 and BioFlash on October 28, 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.*