# BioChemAR vs GoatHSK

The clearest difference is price: BioChemAR at Free against GoatHSK's $2.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

BioChemAR is free to download; GoatHSK costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BioChemAR ships an update fortnightly, GoatHSK weekly. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | BioChemAR | GoatHSK |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | — | Paid |
| Size | 232 MB | 100 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carleton College](https://appshunter.io/developer/1115389489) | [Matthias Holl](https://appshunter.io/developer/1896291232) |

## What reviewers say

### BioChemAR

[App page](https://appshunter.io/ios/app/biochemar/id1434332440)

**Features:** macOS Compatibility

**In-app purchases:** none


### GoatHSK

[App page](https://appshunter.io/ios/app/goathsk/id6770220174)

This offline flashcard app helps you learn HSK vocabulary levels 1-9. It uses spaced repetition to adapt to your memory, ensuring efficient review without overwhelming you with known words. All 11,000+ entries are available in one place.

**Highlights:** Offline HSK vocabulary learning, Supports HSK levels 1-9, 11,000+ vocabulary entries, Spaced repetition (FSRS-5), No account or subscription required, No user tracking

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BioChemAR free?

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

### Is GoatHSK free?

GoatHSK costs $2.99, with no in-app purchases.

### Do BioChemAR or GoatHSK have ads?

Neither BioChemAR nor GoatHSK shows ads.

### Which is updated more often, BioChemAR or GoatHSK?

BioChemAR ships an update fortnightly, and GoatHSK weekly. Most recently, BioChemAR was updated on October 29, 2026 and GoatHSK on October 31, 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.*