Comparison

Stayf vs ZERO Training Center

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Stayf

Features
Read full description

Sports, wellbeing, and team building in one app. Boost your energy and health with regular workouts and exciting sports challenges! The app is based on the nudge concept by economist and Nobel laureate Richard Tatler that every person needs a slight external push to work and live more efficiently. This idea is technically embodied with gamification, digital and creative mechanics: 1. Global Challenge — participants unite in the app to solve a shared challenge. The application captures everyone's contribution in real-time and shows how the team is moving towards the goal. 2. Personal challenges are individual tasks that help each participant achieve personal triumphs and feel the joy of an energetic lifestyle. 3. Corporate sports events — app mechanics allow you to involve participants from different regions and countries in one event. 4. Expert content — the app regularly publishes articles, stories, and video courses about healthy lifestyle, nutrition, motivation, and stress management. 5. Chat inside the application — for communication between participants with experts in nutrition and sports. Other details: - tracking of more than 20 types of physical activity - auto sync with Apple Health and Google Fit, Polar Flow and Garmin Connect - devoted support — operators are available in the app to solve any questions - a well-thought-out notification system so that everyone is updated and progresses toward the global goal - the application complies with the law requirements on the personal data storage Available for corporate clients only — to register in the app, contact your company, university, etc.

About

ZERO Training Center

This app helps you manage your health and fitness journey. Book classes, track workout progress, monitor body measurements, and connect with club staff. It integrates with Apple Health to import data from wearables and track daily activity.

Highlights
  • Book classes online
  • Track workout progress
  • Monitor body measurements
  • Contact club staff
  • Apple Health integration
  • Import wearable data
Features
Read full description

Guiding you through your health and fitness journey! - Book classes online in just a few clicks - Track your progress from all your workouts - Keep track of your body measurements and progress - Contact club staff directly Apple Health App Integration Track your progress with our HealthKit app integration to import and measure your daily steps, distance or calories burnt. Also use HealthKit to import your data from a range of different wearable devices.

Screenshots

Stayf4 screens
ZERO Training Center2 screens

Verdict

The call

The clearest difference is update cadence: ZERO Training Center at every 3 weeks against Stayf's every 2 months. ZERO Training Center also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Stayf ships an update every 2 months, ZERO Training Center every 3 weeks. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

Scorecard2 real differences · 7 level
Stayf versus ZERO Training Center: the parameters behind the verdict, then further details
ParameterStayfZERO Training Center
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.113.0 — better
Further details — not scored
Size123 MB31 MB
Age rating17+4+
DeveloperSTAYF LTDTeamUp Sports

In-app purchases

None

Stayf

No in-app purchases

None

ZERO Training Center

No in-app purchases

Questions

Is Stayf free?
Stayf is free to download, with no in-app purchases.
Is ZERO Training Center free?
ZERO Training Center is free to download, with no in-app purchases.
Do Stayf or ZERO Training Center have ads?
Neither Stayf nor ZERO Training Center shows ads.
Which is updated more often, Stayf or ZERO Training Center?
Stayf ships an update every 2 months, and ZERO Training Center every 3 weeks. Most recently, Stayf was updated on October 9, 2026 and ZERO Training Center on October 17, 2026.

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