Comparison

C 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

C

This app verifies gym check-ins with GPS to track real progress and build streaks. It allows users to log workouts, compete on leaderboards, and connect with friends and local gym communities. Premium features offer advanced analytics and customization.

Highlights
  • GPS-verified gym check-ins
  • Workout logging (exercises, sets, reps, weight)
  • Streaks and XP for gym attendance
  • Monthly gym leaderboards
  • Social features: follow friends, group challenges
  • Muscle group identification
  • Rest timer with Lock Screen Live Activities
Features
Read full description

Most fitness apps take your word for it. C-Rex does not. C-Rex is a GPS-verified gym and workout tracker that turns showing up into real progress. Every check-in is tied to the gym you are actually visiting. Build streaks, earn XP, compete on monthly gym leaderboards and train with people around you. SHOW UP AND MAKE IT COUNT Check in when you arrive at the gym. C-Rex uses GPS to verify that you are actually there. Build a streak based on real gym sessions, not good intentions. Earn XP and climb your gym’s monthly leaderboard. Join challenges and earn rewards when you complete them. TRAIN WITH YOUR PEOPLE Follow friends and see who is training right now. View your friends’ workout activity in one feed. Create or join groups with your training partners. Take on group challenges together. Message the people you train with without leaving the app. LOG EVERY WORKOUT Track exercises, sets, reps, weight, duration and cardio. Choose from a database of 500+ exercises. See a weekly muscle map showing what you have trained. Identify the muscle groups you keep neglecting. Select the muscles you want to work and build a session around them. Use the rest timer while you train. Keep your timer visible on your Lock Screen with Live Activities. FIND YOUR GYM COMMUNITY Discover gyms near you on the map. See who is training at nearby gyms. Find gym buddies who match your training lifestyle. Share workouts, progress and achievements with the community. C-REX PREMIUM Upgrade to Premium for: Progress charts over time Private progress comparisons with friends The ability to see who viewed your profile Custom name colours and emojis GIFs in group chats Streak Shield protection C-Rex’s core features — including gym check-ins, workout logging, streaks, XP, social features, challenges and chat — are available for free. Premium is available as a monthly or yearly subscription. Subscriptions automatically renew unless cancelled at least 24 hours before the current billing period ends. Payment is charged to your Apple Account upon confirmation of purchase. You can manage or cancel your subscription through your Apple Account settings after purchase. Privacy Policy: https://gym-app-ce4a9.web.app/privacy Terms of Service: https://gym-app-ce4a9.web.app/terms

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

C4 screens
The Training Notebook One4 screens

Verdict

The call

The clearest difference is rating: C 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 device support (3 vs 1). On price, review sentiment, ratings volume and ads 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. C sells 2 in-app purchases, starting at $4.99 per month 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

C holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 5 and 9 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

C ships an update every 5 days, The Training Notebook One daily. Both last shipped on October 31, 2026.

Scorecard3 real differences · 7 level
C versus The Training Notebook One: the parameters behind the verdict, then further details
ParameterCThe Training Notebook One
PriceFreeFree
Rating5.0 (5 ratings) — better4.0 (9 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings59 — better
Update frequencyEvery 5 daysDaily — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size125 MB44 MB
Age rating12+4+
DeveloperJerry KwongThe Training Notebook, Inc.

Customer experience

C

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 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

2 purchases

C

Subscriptions2
  • C-Rex Monthly Subscription$4.991 Month
  • C-Rex Yearly Subscription$49.991 Year
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 C free?
C 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, C or The Training Notebook One?
C is rated higher. C averages 5.0 out of 5 from 5 ratings, while The Training Notebook One averages 4.0 from 9 ratings.
Do C or The Training Notebook One have ads?
Neither C nor The Training Notebook One shows ads.
Which is updated more often, C or The Training Notebook One?
C ships an update every 5 days, and The Training Notebook One daily. Most recently, C was updated on October 31, 2026 and The Training Notebook One on October 31, 2026.

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