# Bluck vs Chemify

The clearest difference is in-app purchases: Chemify at none against Bluck's 1. Bluck's advantage is ads (none vs shown) and update cadence (every 11 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Bluck sells 1 in-app purchase, starting at $1.99 per month. Chemify asks for nothing beyond the download.

Bluck ships an update every 11 days, Chemify every 2 months. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Bluck | Chemify |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 11 days** | Every 2 months |
| Size | 120 MB | 26 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Seungrae Cho](https://appshunter.io/developer/1620778100) | [Peppertree](https://appshunter.io/developer/1828600653) |

## What reviewers say

### Bluck

[App page](https://appshunter.io/ios/app/bluck-challenge-tracker/id6740204211)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| pro plan | $1.99 | per month |


### Chemify

[App page](https://appshunter.io/ios/app/chemify-personality-test/id6762519504)

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

**In-app purchases:** none


## Frequently asked questions

### Is Bluck free?

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

### Is Chemify free?

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

### Do Bluck or Chemify have ads?

Chemify shows ads; Bluck does not.

### Which is updated more often, Bluck or Chemify?

Bluck ships an update every 11 days, and Chemify every 2 months. Most recently, Bluck was updated on October 15, 2026 and Chemify on October 24, 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.*