Plank Challenge vs 30 Day Back Ext. Challenge!
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Plank Challenge
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.
- 5-week structured plank program
- Progressive push-up training
- Daily workout instructions
- Progress tracking
- Apple Music integration
- Distraction-free interface
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Hold a 4-minute plank in just 5 weeks – no gym, no equipment, only a few minutes a day. Plank Challenge is a proven, progressive program that takes you from beginner to a 4-minute plank, step by step. HOW IT WORKS - Train 4 days, rest 3 – your muscles get time to recover and grow stronger - Progressive plan designed to prevent injury - Clear daily instructions and progress tracking - Bonus: build from 1 to 100 push-ups at your own pace WHY PLANKS? Planks strengthen your abs, back and arms at the same time. They're one of the most effective bodyweight exercises for core stability and overall strength. FEATURES - 5-week structured program - Push-up challenge from 1 to 100 - Progress tracking - Apple Music integration – your music resumes automatically after each workout - Simple, distraction-free design FOR BEGINNERS AND RETURNERS Whether you're brand new or getting back into shape, the program meets you where you are. PRO - Ad-free - 4 premium themes - Trophy Room - Advanced statistics - Lifetime access – pay once Join 127,000+ people who have built a stronger core with Plank Challenge. Download now and see what you're capable of.
30 Day Back Ext. Challenge!
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.
- Count back extensions daily
- Manage achievement days
- Receive notifications
- Record active energy
- Sync with Apple Health
- Track workouts
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Supports Back Extension for 30 day challenge. Main function is to count Back Extension once a day. Main Function ・Count Back Extension. ・Achievement days management. ・Notifications. ・Record Active Energy and Workouts to Apple Health. How to use ・Put iPhone on floor. ・Tap screen. ・Keep your face close to iPhone screen. (Upper part) * ・Or count on iPhone screen tap. Active Energy ・Ex. METs 3.5, Weight 50 kg, Time 10 min. (3.5 - 1) x 50 x (10 / 60) x 1.05 = 21.86 kcal. Optional permission requests ・Apple Health: It is used to record data in Apple Health. ・Tracking: It is used to deliver personalized ads to you. ・Notifications: It is used to sending notifications. Languages ・Japanese, English. *Dynamic Island devices not supported
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Plank Challenge | 30 Day Back Ext. Challenge! |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (472 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 65.7% of reviews — better | 46.2% of reviews |
| Number of ratings | 472 — better | 6 |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 17 MB | 21 MB |
| Age rating | 4+ | 17+ |
| Developer | Bo Kalvslund | Intersect |
Customer experience
Plank Challenge
30 Day Back Ext. Challenge!
Bugs and requests
Plank Challenge
Reported bugs
4 issues- 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
10 requests- Allow self-designed workouts
- Integrate reminders
- Add in-app music or motivational sounds
- Provide explanation on different plank types
- Include countdowns and motivational cues
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- Suggest exercises for rest periods
- Modern and minimalist design
- Add a training plan for push-ups
- Voice countdown for seconds
- Dark mode option
30 Day Back Ext. Challenge!
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Plank Challenge
- Plank Challenge Pro$0.99
30 Day Back Ext. Challenge!
No in-app purchases
Questions
Is Plank Challenge free?
Is 30 Day Back Ext. Challenge! free?
Which has better reviews, Plank Challenge or 30 Day Back Ext. Challenge!?
Do Plank Challenge or 30 Day Back Ext. Challenge! have ads?
Which is updated more often, Plank Challenge or 30 Day Back Ext. Challenge!?
Other comparisons
