DELTA55 vs Stark Ring
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
DELTA55
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With the DELTA55 app interacting with your fitness club on your mobile device has never been easier. Manage everything from your class bookings to your membership details for a full club experience. Download the app to: - Enter your club using QR codes - Book classes with your favorite club - Get club details such as opening hours, location, etc. - Invite friends to join your club - Monitor club and class attendance history - Preview your membership details - Receive class reminders
Stark Ring
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ā¢ Redesigned Home, Pulse, Activity, and Sleep tabs ā¢ Clearer health metrics and sleep timeline ā¢ Smoother tab navigation ā¢ Bug fixes and stability improvements
Screenshots
Verdict
The clearest difference is update cadence: Stark Ring at every 2 weeks against DELTA55's every 2 months. Stark Ring also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
DELTA55 ships an update every 2 months, Stark Ring every 2 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.
| Parameter | DELTA55 | Stark Ring |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 weeks ā better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad, iPod ā better |
| Requires iOS | 16.6 | 15.1 ā better |
| Further details ā not scored | ||
| Size | 103 MB | 102 MB |
| Age rating | 4+ | 4+ |
| Developer | Perfect Gym Solutions Sp. z o.o. | Dien Nha Huyen |
In-app purchases
DELTA55
No in-app purchases
Stark Ring
No in-app purchases
Questions
Is DELTA55 free?
Is Stark Ring free?
Do DELTA55 or Stark Ring have ads?
Which is updated more often, DELTA55 or Stark Ring?
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