Comparison

Simple Zones vs FDI.me

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

Head to head
About

Simple Zones

Track your workouts in real-time using heart rate zone training. Get instant feedback on your performance to optimize intensity and achieve your fitness goals. Supports Apple Watch and Bluetooth heart rate monitors.

Highlights
  • Real-time heart rate zone visualization
  • Apple Watch and Bluetooth HRM support
  • Customizable zone models
  • Apple Health integration
  • Workout data syncing
  • Activity ring tracking
Features
Read full description

SWEAT SMARTER WITH HEART RATE ZONE TRAINING FOR A BETTER, STRONGER YOU! Visualize how hard you’re working with REAL-TIME ZONE TRAINING using your Apple Watch or connected Bluetooth Heart Rate Monitor No matter your workout activity, you can use Zone Training to get instant feedback on your performance and start crushing your fitness goals. With just a quick glance at the eye-catching zones on your phone or wrist during your workout, you’ll know whether you should pump the brakes on the intensity or crank it up a notch. We use your beats per minute (bpm) and percent of max heart rate to show you which zone you’re in, so you can take the guesswork out of your fitness routine and start maximizing your results today. The Zones App has five branded zone models to choose from, inspired by some of your favorite fitness brands: • Peloton* • NordicTrack* (also supports iFit ActivePulse*!) • Echelon • Orange Zones • Heart Health** * Peloton, NordicTrack, ActivePulse, and Echelon are trademarks owned by those respective companies. ** Inspired by the American Heart Association exercise & fitness guidelines for maintaining a Healthy Heart. BENEFITS OF HEART RATE ZONE TRAINING - Reduced Risk of Fatigue & Overtraining - Better, More Restorative Recovery - Maximum Fat Burn and Weight Loss - Increased Speed and Endurance - Enhanced Performance PRIVACY We value your privacy and never share or sell any user information. APPLE HEALTH INTEGRATION - We read Heart Rate from your Apple Watch via Apple Health - We (optionally) save your workout data to Apple Health - All workouts count towards your Apple activity rings - Sync workouts to Strava, TrainingPeaks, or your favorite workout app through Apple Health importing APPLE WATCH REQUIREMENTS The minimum requirement for the Apple Watch is a series 3 or later. BLUETOOTH HEART RATE MONITOR SUPPORT Connect any standard Bluetooth heart rate monitor, armband, or chest strap. Use your OTBeat, Polar, Wahoo, or Garmin HRM. Terms of Service: https://www.workoutcompanions.app/terms-of-use Privacy Policy: https://www.workoutcompanions.app/privacy-policy

About

FDI.me

Features
Read full description

FDI.me is an intelligent platform for athletes of all levels: from beginners to professionals. Sync data from any sensor, join tournaments, and track your progress with high precision. Universal Sensor Compatibility - Works with any BLE/ANT+ devices: wrist and chest heart rate monitors, plus smartwatches from various manufacturers - Even with a basic fitness band, our algorithms calculate key performance metrics - Automatic sync of heart rate, pace, intensity, and other parameters - Support for simultaneous use of multiple devices (HR monitor + smart jump rope + fitness ring, etc.) Athlete Passport - Unified digital profile with your complete training history and achievements - Personal metrics: Vo2Max, HRV, Heart Load, recovery quality, and more - Progress trends visualized in clear charts and diagrams - Personalized recommendations for minimum daily activity based on athlete parameters - Option to track and log various non-sporting parameters and their history Smart Training Planning - Personalized workout plans with timing, reps, and weight prescriptions - Customizable heart rate zones and intensity targets aligned to your goals - Adaptive recommendations + AI-powered workout quality scoring - Pre-built workout templates with flexible plan examples (by HR zones, intensity, or rep counts) Deep Performance Analytics - Detailed analysis of each session with heart rate heatmaps and reaction tracking to specific exercise types - Unique Heart Load metric with rest recommendations for extreme values - Automatic tonnage calculation at the end of each workout - Session quality scoring based on HR, load, recovery, and key metrics - Detailed reports with graphs, trends, and period-over-period comparisons Compete in Tournaments - Connect to any club using the FDI ecosystem to join championships and tournaments - Track your results and compare performance with other connected participants - View tournament tables, group results, and semi-finals organized by FDI-system clubs - Challenge friends, earn points, and climb the leaderboards - Share workout results, save and share your workout templates, and get feedback from ecosystem members Why Choose FDI.me? Accuracy: Proprietary algorithms compensate for limitations of basic sensors Flexibility: Customize interface, HR zones, and workout types your way Universality: Works with any hardware - from Garmin watches to budget bands which supports heart rate transmission. Community: Clubs, tournaments, rankings - train as part of a team Progress: See results in numbers, graphs, and real-world achievements Who Is This App For? Runners & triathletes - HR control, intensity zones, recovery tracking Cyclists - tonnage logging, power, cadence, cycling-optimized UI skins Strength athletes - rep/weight plans, rest timers, session tonnage tracking Wellness enthusiasts - daily minimum activity goals and habit tracking Club athletes - rankings, official tournaments, verified statistics Privacy & Data Security - All data stored locally and never shared externally - No transfer of personal information to third parties without explicit consent Download FDI.me today - turn your workouts into a system, and your progress into results! This app is not a medical device. Please consult a healthcare professional before starting any new training program.

Screenshots

Simple Zones4 screens
FDI.me4 screens

Verdict

The call

The clearest difference is in-app purchases: FDI.me at none against Simple Zones's 2. Simple Zones's advantage is update cadence (monthly vs every 3 months). On price, ads, device support and iOS requirement 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. Simple Zones sells 2 one-off in-app purchases. FDI.me asks for nothing beyond the download.

UpkeepUpdate frequency

Simple Zones ships an update monthly, FDI.me every 3 months. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 8 level
Simple Zones versus FDI.me: the parameters behind the verdict, then further details
ParameterSimple ZonesFDI.me
PriceFreeFree
Rating4.0 (50 ratings) — better—
Positive reviews54.8% of reviews—
Number of ratings50 — better—
Update frequencyMonthly — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod
Requires iOS15.414.0 — better
Further details — not scored
Size18 MB49 MB
Age rating4+4+
DeveloperBred Ventures IncDmitrii Minin

In-app purchases

2 purchases

Simple Zones

One-time2
  • Zones Pro$4.99
  • Zones Pro$9.99
None

FDI.me

No in-app purchases

Questions

Is Simple Zones free?
Simple Zones is free to download, with in-app purchases available.
Is FDI.me free?
FDI.me is free to download, with no in-app purchases.
Do Simple Zones or FDI.me have ads?
Neither Simple Zones nor FDI.me shows ads.
Which is updated more often, Simple Zones or FDI.me?
Simple Zones ships an update monthly, and FDI.me every 3 months. Most recently, Simple Zones was updated on October 24, 2026 and FDI.me on October 11, 2026.

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