# Heterocycles vs Parent Dost

The clearest difference is in-app purchases: Parent Dost at none against Heterocycles's 1. Parent Dost also leads on update cadence (every 2 weeks vs every 11 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Heterocycles ships an update every 11 months, Parent Dost every 2 weeks. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Heterocycles | Parent Dost |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/heterocycles/id6445909269/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 27 MB |
| Requires iOS | **15.0** | 15.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Clarity Applications](https://appshunter.io/developer/1646120472) | [Acadza](https://appshunter.io/developer/1786609355) |

## What reviewers say

### 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 |


### Parent Dost

[App page](https://appshunter.io/ios/app/parent-dost/id6739706825)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Heterocycles free?

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

### Is Parent Dost free?

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

### Do Heterocycles or Parent Dost have ads?

Neither Heterocycles nor Parent Dost shows ads.

### Which is updated more often, Heterocycles or Parent Dost?

Heterocycles ships an update every 11 months, and Parent Dost every 2 weeks. Most recently, Heterocycles was updated on October 11, 2026 and Parent Dost on October 18, 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.*