Comparison

TensionRadar vs The Training Notebook One

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

Head to head
About

TensionRadar

This app analyzes your Apple Watch heart data to provide a wellness score based on HRV and heart rate. Explore historical trends, engage in guided breathing exercises, and track your progress with customizable widgets. It's a wellness tool, not a medical device.

Highlights
  • HRV and heart rate wellness score
  • Personalized historical comparisons
  • Guided breathing exercises
  • Daily HRV and resting heart rate tracking
  • Apple Watch app and complications
  • Customizable widgets
Features
Read full description

TensionRadar helps you explore the heart data your Apple Watch records in Apple Health, with expressive characters, personal comparisons and guided breathing. UNDERSTAND YOUR READINGS The 0–100 score is a wellness estimate based on HRV relative to your personal history, with heart rate included when suitable data is available. Current readings use references for the same HRV statistic and time of day. See the reading age, supporting values and confidence. Missing, stale or activity-affected data can leave the current score unavailable. HRV does not directly measure emotions, and the score is not a diagnosis. While newer data arrives, Radar keeps the last qualified assessment visible with its original measurement time. If no qualified assessment is saved, it shows the latest available HRV without a tension score. Historical results do not trigger new stress alerts. The app, Watch dashboard and Radar/score widgets use the same reading policy; background refresh timing can differ. EXPLORE YOUR HISTORY View daily HRV, individual SDNN measurements, resting heart rate and hourly patterns. The daily HRV calendar compares daily averages with your usual days; it is not a record of your mood. On unfolded iPhone Duo, keep the calendar beside the selected day's details. TAKE A BREATH Follow paced breathing, review saved sessions and keep a journal. Add HRV and resting heart rate trend widgets. Use the Apple Watch app and compatible complications. Nimbus is included; additional characters are available through the optional Character Pack purchase. UPDATES AND PRIVACY Apple controls when measurements and background updates arrive. Readings and alerts are not continuous or guaranteed to be immediate. No account is required. Health data is processed on your devices. Requires iOS 18 or later and an Apple Watch that records HRV. TensionRadar is a wellness tool, not a medical device. It does not diagnose or treat conditions. Consult a healthcare professional before making medical decisions. The optional Character Pack purchase is processed by Apple. RevenueCat receives purchase records and an anonymous customer identifier for purchase reporting. TensionRadar does not send HealthKit measurements, HRV or tension scores, or journal content to RevenueCat. There is no advertising or cross-app tracking. RevenueCat also receives anonymous paywall views, dismissals and interactions for analytics.

About

The Training Notebook One

This app helps personal trainers manage client workouts, progress, and notes efficiently. It allows trainers to build custom programs quickly, track client check-ins, and visualize progress with photos and graphs. Clients can also access their own profiles to view workouts and log information.

Highlights
  • Build workouts and programs quickly
  • Client login and workout access
  • Progress photo comparison
  • Body weight and body fat graphs
  • Circumference measurements
  • Exercise history and personal records
  • Client intake forms
Features
Read full description

PERSONAL TRAINERS, PROGRAM BEFORE THE CLIENT ARRIVES. Your client is walking in. You should already know what you're doing. You know how to train people. The hard part is remembering what you did with them last Tuesday, what's due today, and where you wrote it down. The Training Notebook One keeps your workouts, clients, calendar, notes, and progress in one place. Start a workout in 2 taps. Build a 6-exercise workout in under 15 seconds. THE WORKOUT - Build workouts fast - Build programs ahead of time and copy them for each client - Sessions on the calendar, month, week, or day - Notes where you need them, not in a spreadsheet THE CLIENT Your clients get their own login in the same app. Free. - See and run their workouts - Log check ins with weight and photos - Write notes to you New client? Send the intake form by email. They fill it out online. THE PROGRESS Eventually somebody asks if it's working. Show them. - Progress photos with before and after compare - Body weight and body fat graphs - Circumference measurements - Exercise history with progress charts - Personal records, per exercise, per client NO FEATURE GAMES Every plan gets the full app. The only difference is how many active clients you have. - Starter: up to 10 clients - Growth: up to 20 clients - Pro: up to 50 clients TRY IT FOR 7 DAYS Every account starts on Pro, free for 7 days. Built by a trainer. Helping trainers since 2012. Subscriptions are billed through your App Store account and renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store settings. Privacy Policy: https://thetrainingnotebook.com/privacy-policy Terms of Use: https://thetrainingnotebook.com/terms-of-use

Screenshots

TensionRadar4 screens
The Training Notebook One4 screens

Verdict

The call

The clearest difference is rating: TensionRadar at 5.0 against The Training Notebook One's 4.0. The Training Notebook One's advantage is update cadence (daily vs every 5 days) and ratings volume (9 vs 1). On price, review sentiment, ads and in-app purchases 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. TensionRadar sells 1 one-off in-app purchase and The Training Notebook One sells 6 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

TensionRadar holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: The Training Notebook One has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

TensionRadar ships an update every 5 days, The Training Notebook One daily. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
TensionRadar versus The Training Notebook One: the parameters behind the verdict, then further details
ParameterTensionRadarThe Training Notebook One
PriceFreeFree
Rating5.0 (1 ratings) — better4.0 (9 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings19 — better
Update frequencyEvery 5 daysDaily — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS18.015.0 — better
Further details — not scored
Size42 MB44 MB
Age rating4+4+
DeveloperChen HeThe Training Notebook, Inc.

Customer experience

TensionRadar

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

The Training Notebook One

All ratings9 ratings
Positive77.8%
Neutral0.0%
Negative22.2%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

TensionRadar

One-time1
  • Character Pack$0.99
6 purchases

The Training Notebook One

Subscriptions6
  • Starter Monthly$19.991 Month
  • Growth Monthly$39.991 Month
  • Pro Monthly$69.991 Month
Show 3 more
  • Starter Annual$199.991 Year
  • Growth Annual$399.991 Year
  • Pro Annual$699.991 Year

Questions

Is TensionRadar free?
TensionRadar is free to download, with in-app purchases available.
Is The Training Notebook One free?
The Training Notebook One is free to download, with in-app purchases available.
Which has better reviews, TensionRadar or The Training Notebook One?
TensionRadar is rated higher. TensionRadar averages 5.0 out of 5 from 1 ratings, while The Training Notebook One averages 4.0 from 9 ratings.
Do TensionRadar or The Training Notebook One have ads?
Neither TensionRadar nor The Training Notebook One shows ads.
Which is updated more often, TensionRadar or The Training Notebook One?
TensionRadar ships an update every 5 days, and The Training Notebook One daily. Most recently, TensionRadar was updated on November 3, 2026 and The Training Notebook One on October 31, 2026.

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