# Plank Challenge vs 30 Day Back Ext. Challenge!

The clearest difference is in-app purchases: 30 Day Back Ext. Challenge! at none against Plank Challenge's 1. 30 Day Back Ext. Challenge! also leads on rating (5.0 vs 4.7). Plank Challenge's advantage is ratings volume (472 vs 6) and review sentiment (66% vs 46%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Plank Challenge sells 1 one-off in-app purchase. 30 Day Back Ext. Challenge! asks for nothing beyond the download.

30 Day Back Ext. Challenge! holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Plank Challenge has 472 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 66% of Plank Challenge's written reviews are positive against 46% of 30 Day Back Ext. Challenge!'s, so the app with the better star average is not the one people write more warmly about.

Plank Challenge ships an update every 3 weeks, 30 Day Back Ext. Challenge! every 3 months. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Plank Challenge | 30 Day Back Ext. Challenge! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (472 ratings)](https://appshunter.io/ios/app/plank-challenge-core-workout/id1083360252/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/30-day-back-ext-challenge/id1435562187/reviews)** |
| Number of ratings | **472** | 6 |
| Positive reviews | **65.7% of reviews** | 46.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 17 MB | 21 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Bo Kalvslund](https://appshunter.io/developer/572272193) | [Intersect](https://appshunter.io/developer/641416964) |

## What reviewers say

### Plank Challenge

[App page](https://appshunter.io/ios/app/plank-challenge-core-workout/id1083360252)

This app guides you through a 5-week program to build up to a 4-minute plank. It requires no equipment and can be done in just 4 minutes daily, with rest days incorporated for recovery. It also includes a bonus push-up progression.

**Highlights:** 5-week structured plank program, Progressive push-up training, Daily workout instructions, Progress tracking, Apple Music integration, Distraction-free interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plank Challenge Pro | $0.99 | one-time |

**What reviewers like**

- 👍 Simple and effective
- 💪 Great for plank challenges
- 🎯 Helps build stamina
- ✅ Good for beginners
- ✨ Straightforward design

**What reviewers complain about**

- 🔇 Music pauses during sets
- 🎵 Lack of in-app music/motivation
- ❓ No clear guidance on plank types
- 🎛️ No timer customization
- 👎 Push-up part lacks challenge

**Reported bugs**

- App crashes after iOS 13 update
- No times displayed after iOS 13 update
- Audio mutes automatically between active and rest
- App not running after iOS 13 update

**Requested features**

- Allow self-designed workouts
- Integrate reminders
- Add in-app music or motivational sounds
- Provide explanation on different plank types
- Include countdowns and motivational cues


### 30 Day Back Ext. Challenge!

[App page](https://appshunter.io/ios/app/30-day-back-ext-challenge/id1435562187)

This app helps you track your daily back extensions for a 30-day challenge. It allows you to count your exercises, manage your progress, and receive notifications. You can also record active energy and workouts to Apple Health.

**Highlights:** Count back extensions daily, Manage achievement days, Receive notifications, Record active energy, Sync with Apple Health, Track workouts

**In-app purchases:** none


## Frequently asked questions

### Is Plank Challenge free?

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

### Is 30 Day Back Ext. Challenge! free?

30 Day Back Ext. Challenge! is free to download, with no in-app purchases.

### Which has better reviews, Plank Challenge or 30 Day Back Ext. Challenge!?

30 Day Back Ext. Challenge! is rated higher. Plank Challenge averages 4.7 out of 5 from 472 ratings, while 30 Day Back Ext. Challenge! averages 5.0 from 6 ratings.

### Do Plank Challenge or 30 Day Back Ext. Challenge! have ads?

Both Plank Challenge and 30 Day Back Ext. Challenge! show ads.

### Which is updated more often, Plank Challenge or 30 Day Back Ext. Challenge!?

Plank Challenge ships an update every 3 weeks, and 30 Day Back Ext. Challenge! every 3 months. Most recently, Plank Challenge was updated on October 28, 2026 and 30 Day Back Ext. Challenge! 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.*