Comparison

CTS ActivityLab vs HealthyFast

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

Head to head
About

CTS ActivityLab

Analyze detailed fitness data from various sports devices. Compare multiple activities, inspect GPS accuracy, and visualize routes and statistics with powerful charts. Gain insights beyond basic watch metrics.

Highlights
  • Compare multiple activities side-by-side
  • Import activities from Apple Health
  • Analyze GPS accuracy and track quality
  • Inspect elevation and altitude data
  • Review sensor metrics (heart rate, pace, etc.)
  • Visualize routes and statistics with charts
  • Compare device accuracy with custom algorithm
Features
Read full description

ActivityLab is designed for athletes who want to understand their fitness data beyond the basic metrics shown by their watch and to compare multiple devices side by side. Import GPX, FIT, and TCX files from Garmin, COROS, Apple Watch, Suunto, Polar, Amazfit, Wahoo, and many other devices to explore detailed performance data. With ActivityLab you can: • Compare multiple activities side-by-side • Import activities directly from Apple Health (IOS Only) • Analyze GPS accuracy and track quality • Inspect elevation and altitude data • Review heart rate, pace, cadence, power, battery usage, and other sensor metrics • Visualize routes and activity statistics with powerful charts • Discover insights that aren't available in your watch's companion app • Compare device accuracy side-by-side with ActivityLabs custom agreement algorithm • Save and Sync comparisons across multiple devices (iPhone, iPad, and Mac!) Whether you're testing new GPS watches, training for your next race, or simply curious about your data, ActivityLab gives you professional-grade analysis tools in an easy-to-use interface. CTS ActivityLab is free for importing, viewing, analyzing, and sharing one activity at a time. An optional ActivityLab Pro auto-renewing subscription is required to compare multiple activities, view agreement statistics, and save or sync comparisons with iCloud. Eligible new subscribers receive a 7-day free trial, followed by the localized monthly App Store price. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

HealthyFast

Features
Read full description

Fasting, food, strength training and stretching — together in one ad-free app. HealthyFast helps you build a daily routine around the things that matter to you. Track your fasts, log meals, follow a workout and make time to stretch. Choose the screens you use, arrange them your way and open the app on your favorite. FASTING AT YOUR PACE • Follow your fast with a clear timer and progress ring. • Choose a fasting goal and get reminders to keep track. • Explore educational fasting phases with links to supporting research. • Review your fasting history over time. Fasting phases are general, time-based estimates. They do not measure your metabolism or tell you exactly what is happening in your body. MEALS, CALORIES AND MACROS • Keep your meals and daily nutrition in one place. • Describe or photograph a meal for an AI estimate of calories, protein, carbohydrates and fat. • Compare your intake with an estimated daily energy target based on your profile. • Follow weight and nutrition trends over time. AI estimates are approximate. Cloud AI is optional, requires sign-in and asks for your consent before sending meal descriptions or photos for processing. STRENGTH TRAINING • Choose a program suited to your experience and follow guided sessions. • Log sets, reps and weights, with exercise guides to help you along the way. • Use progression guidance and review your training history. • Create and organize your own programs. GUIDED STRETCHING • Explore stretching routines and programs. • Follow timed sessions with visual exercise guidance. • Save favorites and keep a history of completed sessions. YOUR APP, YOUR ROUTINE • Show the screens you need and hide the rest. • Reorder your menu and choose your favorite start screen. • Swipe between fasting, meals, training, stretching, Journal and Insights. • See your activity history and trends in one place. APPLE WATCH AND APPLE HEALTH • Follow your fast and log strength workouts on Apple Watch. • Keep fasting progress close with watch complications. • Connect Apple Health to bring supported steps, sleep, weight, nutrition and workout data into your overview. • Share supported meal, weight and workout entries with Apple Health when you grant permission. OPTIONAL CLOUD BACKUP Sign in to back up your data and restore it on another phone. Core tracking does not require a HealthyFast account. SUBSCRIPTIONS You can explore the app and set up your profile before choosing a plan. New users need a subscription to start tracking. Eligible existing users retain their basic access. Premium features require an active subscription. HealthyFast Premium is available monthly or yearly. Any available trial and the current price are shown before purchase. Payment is charged to your Apple Account at confirmation of purchase, or after an eligible free trial. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your Apple Account settings. HealthyFast is a wellness and education tool, not a medical device or a substitute for professional medical advice. Energy, nutrition and fasting information are estimates. Consult a qualified healthcare professional before changing your fasting or exercise routine, especially if you have a medical condition, take medication, or are pregnant or breastfeeding. Privacy Policy: https://sites.google.com/view/northernappdev/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CTS ActivityLab4 screens
HealthyFast4 screens

Verdict

The call

The clearest difference is update cadence: CTS ActivityLab at every 2 days against HealthyFast's every 6 days. HealthyFast's advantage is iOS requirement (15.0 vs 17.0). 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. CTS ActivityLab sells 1 in-app purchase, starting at $1.99 per month and HealthyFast sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

CTS ActivityLab ships an update every 2 days, HealthyFast every 6 days. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 7 level
CTS ActivityLab versus HealthyFast: the parameters behind the verdict, then further details
ParameterCTS ActivityLabHealthyFast
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 days — betterEvery 6 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, MaciPhone, iPad, iPod, Apple Watch — better
Requires iOS17.015.0 — better
Further details — not scored
Size9 MB53 MB
Age rating4+4+
DeveloperCTS Media Group LLCJimmy Hansen

In-app purchases

1 purchases

CTS ActivityLab

Subscriptions1
  • CTS ActiveLab Monthly7 Days trial$1.991 Month
2 purchases

HealthyFast

Subscriptions2
  • Premium Monthly7 Days trial$2.991 Month
  • Display Name: Premium Yearly7 Days trial$22.991 Year

Questions

Is CTS ActivityLab free?
CTS ActivityLab is free to download, with in-app purchases available.
Is HealthyFast free?
HealthyFast is free to download, with in-app purchases available.
Do CTS ActivityLab or HealthyFast have ads?
Neither CTS ActivityLab nor HealthyFast shows ads.
Which is updated more often, CTS ActivityLab or HealthyFast?
CTS ActivityLab ships an update every 2 days, and HealthyFast every 6 days. Most recently, CTS ActivityLab was updated on October 10, 2026 and HealthyFast on October 24, 2026.

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