Comparison

GymSync vs 75 Day Challenge

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

Head to head
About

GymSync

Easily book and manage fitness classes at your gym. View schedules, reserve spots, and receive timely reminders. Get instant notifications for cancellations and reserve list openings.

Highlights
  • View class timetables
  • Book and cancel classes
  • Join reserve lists
  • Class reminders
  • Instant notifications
Features
Read full description

PLEASE NOTE THIS APP WILL ONLY WORK IF YOUR GYM IS CURRENTLY USING GYMSYNC. Book fitness classes with just the touch of a button, anytime, anywhere! If your gym is already signed up to GymSync, download the app and you’re all set to view timetables, book and manage your fitness classes. Contact your gym to find out of they're signed up to GymSync. Features * View class timetables for your gym * Book and cancel your attendance for your favourite classes * Add yourself to a reserve list for classes that are fully booked * Get timely reminders for your classes, so you never forget your kit! * Get instant notifications for reserve place availability, and class cancellations. On the go, instant, hassle free class booking.

About

75 Day Challenge

This app guides users through a 75-day program to build healthy habits and develop resilience. It focuses on consistency and sustainable change for both physical and mental wellness, offering a balanced approach to self-improvement.

Highlights
  • Build lasting healthy habits
  • Stay motivated daily
  • Visualize progress
  • Home screen widgets (Premium)
  • Customize challenge rules (Premium)
  • Flexible scheduling
Features
Read full description

I originally built this app for myself, as a fitness enthusiast looking to rebuild healthy habits. After experiencing its positive impact, I refined it to help others achieve the same transformation. In just 75 days, you’ll build better habits, push your limits, and develop the resilience to tackle any goal. WHY THE 75 SOFT? - Achieve Lasting Change: Transform your daily routine and watch how small, consistent actions lead to big, lasting results. - Stay Motivated Every Day: It’s not just about crossing off tasks; it’s about creating momentum. With each day, you’ll feel more motivated to keep going. - Create Healthier Habits: From fitness to mental wellness, you’ll develop routines that set you up for long-term success—without overwhelming yourself. - Visualize Your Progress: Seeing how far you’ve come will inspire you to keep pushing forward, even on tough days. - Share Your Wins: turn any completed day into a beautiful sticker, add your own photo, and post your progress straight to your story. - Life Happens? Forgiving Mode keeps your challenge alive even when a day isn't perfect — progress over perfection. - Smart Daily Reminders: one gentle nudge at the time you choose. It skips days you've already completed and stops when your challenge ends. - Home Screen Widgets (Premium): Track and update your challenge directly from your Home Screen with interactive widgets. - Customize Your Challenge (Premium): Edit challenge rules and add up to 4 custom rules to tailor the challenge to your goals and make it uniquely yours. - Flexibility for Your Life: Choose your start date or adjust it later if needed, making it easier to fit the challenge into your schedule. If you’ve heard of the 75 Hard, you know how intense and demanding it can be. The 75 Soft offers a more balanced approach to self-improvement, focusing on consistency and sustainable habits without the extreme pressure. It’s perfect for those who want to challenge themselves but also value flexibility and long-term success. WHAT’S POSSIBLE? - A healthier, more focused you—both physically and mentally. - The confidence that comes with discipline and consistency. - The ability to stick to your goals, even when life gets in the way. - A sense of accomplishment that fuels your next big challenge. TAKE CONTROL OF YOUR JOURNEY Whether you're looking to improve your fitness, sharpen your mindset, or simply stay committed to personal growth, the 75 Soft helps you create the life you want—one day at a time. Your journey starts here. Download now and become the best version of yourself. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

GymSync4 screens
75 Day Challenge4 screens

Verdict

The call

The clearest difference is review sentiment: 75 Day Challenge at 88% against GymSync's 29%. 75 Day Challenge also leads on ratings volume (411 vs 1). GymSync's advantage is in-app purchases (none vs 7) and rating (5.0 vs 4.7). On price 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. 75 Day Challenge sells 7 in-app purchases, starting at $3.99 per 7 days. GymSync asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

GymSync holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: 75 Day Challenge has 411 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 29% of GymSync's written reviews are positive against 88% of 75 Day Challenge's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

GymSync ships an update weekly, 75 Day Challenge every 3 weeks. The most recent releases landed on October 16, 2026 and October 23, 2026 respectively.

Scorecard8 real differences · 2 level
GymSync versus 75 Day Challenge: the parameters behind the verdict, then further details
ParameterGymSync75 Day Challenge
PriceFreeFree
Rating5.0 (1 ratings) — better4.7 (411 ratings)
Positive reviews29.4% of reviews88.2% of reviews — better
Number of ratings1411 — better
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size40 MB25 MB
Age rating4+4+
DeveloperSD17Inkolab

Customer experience

GymSync

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews17 reviews
Positive29.4%
Neutral11.8%
Negative58.8%

75 Day Challenge

All ratings405 ratings
Positive94.1%
Neutral1.5%
Negative4.4%
Written reviews144 reviews
Positive88.2%
Neutral2.8%
Negative9.0%

Bugs and requests

GymSync

Not enough reviews yet to summarise bugs or requests.

75 Day Challenge

Reported bugs

2 issues
  • App crashes when trying to start the challenge
  • Issues with the app on older iOS versions

Requested features

3 requests
  • Add ability to track additional daily goals
  • Implement calendar view to see progress
  • Allow recording of specific water intake amounts

In-app purchases

None

GymSync

No in-app purchases

7 purchases

75 Day Challenge

Subscriptions5
  • Premium Access3 Days trial$3.997 Days
  • Premium Access3 Days trial$4.997 Days
  • Premium Access$14.991 Year
Show 2 more
  • Premium Access$19.991 Year
  • Premium Access$29.991 Year
One-time2
  • Unlock all features$4.99
  • Unlock all features$34.99

Questions

Is GymSync free?
GymSync is free to download, with no in-app purchases.
Is 75 Day Challenge free?
75 Day Challenge is free to download, with in-app purchases available.
Which has better reviews, GymSync or 75 Day Challenge?
GymSync is rated higher. GymSync averages 5.0 out of 5 from 1 ratings, while 75 Day Challenge averages 4.7 from 411 ratings.
Do GymSync or 75 Day Challenge have ads?
Neither GymSync nor 75 Day Challenge shows ads.
Which is updated more often, GymSync or 75 Day Challenge?
GymSync ships an update weekly, and 75 Day Challenge every 3 weeks. Most recently, GymSync was updated on October 16, 2026 and 75 Day Challenge on October 23, 2026.

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