# BioFlash vs World Timeline

The clearest difference is ads: BioFlash at none against World Timeline's shown. World Timeline's advantage is update cadence (every 3 weeks vs every 7 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. BioFlash sells 1 in-app purchase, starting at $9.99 per year and World Timeline sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

BioFlash ships an update every 7 months, World Timeline every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | BioFlash | World Timeline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (6 ratings)](https://appshunter.io/ios/app/world-timeline/id6768851972/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 44 MB | 225 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | +4 |
| Developer | [Gentiana Etemi](https://appshunter.io/developer/1883027493) | [Matthew Washe](https://appshunter.io/developer/1896052346) |

## What reviewers say

### 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 |


### World Timeline

[App page](https://appshunter.io/ios/app/world-timeline/id6768851972)

Explore world history visually with an interactive globe and a comprehensive timeline. Tap events to learn their significance and generate study prompts. Designed for homeschoolers and students, it offers a big-picture view of civilizations and historical moments.

**Highlights:** Interactive globe with shifting political maps, Scrollable timeline from Creation to present, Detailed event descriptions and significance, Study playground for AI prompt generation, Offline functionality, Year-by-year political map redraws

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock World Timeline | $0.99 | one-time |


## Frequently asked questions

### Is BioFlash free?

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

### Is World Timeline free?

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

### Do BioFlash or World Timeline have ads?

World Timeline shows ads; BioFlash does not.

### Which is updated more often, BioFlash or World Timeline?

BioFlash ships an update every 7 months, and World Timeline every 3 weeks. Most recently, BioFlash was updated on October 24, 2026 and World Timeline on October 25, 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.*