# Arsyc vs Heterocycles

The clearest difference is in-app purchases: Arsyc at none against Heterocycles's 1. Arsyc also leads on update cadence (every 5 weeks vs every 11 months) and iOS requirement (11.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Heterocycles sells 1 one-off in-app purchase. Arsyc asks for nothing beyond the download.

Arsyc ships an update every 5 weeks, Heterocycles every 11 months. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Arsyc | Heterocycles |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/heterocycles/id6445909269/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 11 months |
| Monetization | — | Free with in-app purchases |
| Size | 83 MB | 17 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Juan Jose Lopez Jimenez](https://appshunter.io/developer/1595370932) | [Clarity Applications](https://appshunter.io/developer/1646120472) |

## What reviewers say

### Arsyc

[App page](https://appshunter.io/ios/app/arsyc/id1595370930)

**Features:** macOS Compatibility

**In-app purchases:** none


### Heterocycles

[App page](https://appshunter.io/ios/app/heterocycles/id6445909269)

Master the names and applications of organic chemistry's heterocycles. This interactive app covers over 75 compounds with hundreds of examples and personalized review modes. Track your progress with achievements and learn about their roles in medicine and biology.

**Highlights:** 75+ heterocycles, Hundreds of examples, Multiple practice modes, Personalized review, Reference table, Achievements

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $4.99 | one-time |


## Frequently asked questions

### Is Arsyc free?

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

### Is Heterocycles free?

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

### Do Arsyc or Heterocycles have ads?

Neither Arsyc nor Heterocycles shows ads.

### Which is updated more often, Arsyc or Heterocycles?

Arsyc ships an update every 5 weeks, and Heterocycles every 11 months. Most recently, Arsyc was updated on October 18, 2026 and Heterocycles on October 11, 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.*