# Challenges Aid vs Odma

The clearest difference is update cadence: Odma at every 5 days against Challenges Aid's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Challenges Aid sells 3 in-app purchases, starting at $0.99 per month and Odma sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Challenges Aid ships an update fortnightly, Odma every 5 days. The most recent releases landed on October 30, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Challenges Aid | Odma |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (8 ratings)](https://appshunter.io/ios/app/challenges-aid/id6443764002/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 36.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Freemium | — |
| Size | 9 MB | 26 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Tim Hilker](https://appshunter.io/developer/1473865123) | [Manuel Auer](https://appshunter.io/developer/6799113160) |

## What reviewers say

### Challenges Aid

[App page](https://appshunter.io/ios/app/challenges-aid/id6443764002)

This app helps you track and achieve your monthly Apple Watch fitness challenges. It provides insights into your progress, offers reminders, and displays your achievements through a history tab and customizable widgets.

**Highlights:** Monthly challenge progress tracking, Historical achievement overview, Motivational messages, Home and Lock Screen widgets, Limited Edition Challenge tracking, Customizable reminders

**Features:** Family Sharing, Apple Watch app, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $0.99 | per month |
| Plus Yearly | $9.99 | per year |
| Plus Lifetime | $29.99 | one-time |


### Odma

[App page](https://appshunter.io/ios/app/odma-apnea-trainer/id6799113158)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Odma Pro – Lifetime | $3.99 | one-time |


## Frequently asked questions

### Is Challenges Aid free?

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

### Is Odma free?

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

### Do Challenges Aid or Odma have ads?

Neither Challenges Aid nor Odma shows ads.

### Which is updated more often, Challenges Aid or Odma?

Challenges Aid ships an update fortnightly, and Odma every 5 days. Most recently, Challenges Aid was updated on October 30, 2026 and Odma on October 8, 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.*