Stretch1.2.3 vs 30 Day Back Ext. Challenge!
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stretch1.2.3
This application offers guided stretching exercises to help reduce muscle pain and fatigue, prevent injuries, and improve overall flexibility. It recommends daily practice for maintaining and enhancing your health.
- Muscle and tendon stretching
- Cool-down stretches
- Warm-up stretches
- Injury prevention
- Muscle tension relaxation
- Improved blood circulation
- Increased flexibility
Read full descriptionHide full description
Stretch exercise is a way everyone can do to stretch the muscles and tendons.Usually cool-down stretch is used for a way to reduce muscle pain and fatigue. Also warm-up stretch is used for as a prevention of injury. Stretch is what has been developed for the prevention of sports injuries, there are many other effects. Relaxation of muscle tension, promote blood circulation, improve joint range of motion, prevention of the weakening of the muscles, increase flexibility, etc.. Stretch is how easy exercise to stimulate the muscles and tendons. It is recommended that you do even a little time every day. Please help in the prevention of injury using this application, also, maintain and improve your health.
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
Read full descriptionHide full description
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 rating: 30 Day Back Ext. Challenge! at 5.0 against Stretch1.2.3's 3.0. 30 Day Back Ext. Challenge! also leads on review sentiment (46% vs 17%) and update cadence (every 3 months vs every 9 months). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
30 Day Back Ext. Challenge! holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: 30 Day Back Ext. Challenge! has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 17% of Stretch1.2.3's written reviews are positive against 46% of 30 Day Back Ext. Challenge!'s.
Stretch1.2.3 ships an update every 9 months, 30 Day Back Ext. Challenge! every 3 months. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.
| Parameter | Stretch1.2.3 | 30 Day Back Ext. Challenge! |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 16.7% of reviews | 46.2% of reviews — better |
| Number of ratings | 1 | 6 — better |
| Update frequency | Every 9 months | Every 3 months — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone | iPhone |
| Requires iOS | 18.6 | 16.6 — better |
| Further details — not scored | ||
| Size | 6 MB | 21 MB |
| Age rating | 4+ | 17+ |
| Developer | JK-SCIENCE CO., LTD. | Intersect |
Customer experience
Stretch1.2.3
30 Day Back Ext. Challenge!
In-app purchases
Stretch1.2.3
No in-app purchases
30 Day Back Ext. Challenge!
No in-app purchases
Questions
Is Stretch1.2.3 free?
Is 30 Day Back Ext. Challenge! free?
Which has better reviews, Stretch1.2.3 or 30 Day Back Ext. Challenge!?
Do Stretch1.2.3 or 30 Day Back Ext. Challenge! have ads?
Which is updated more often, Stretch1.2.3 or 30 Day Back Ext. Challenge!?
Other comparisons
