Comparison

90 Day Challenge vs Gritzo

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

Head to head
About

90 Day Challenge

This app provides personalized 90-day fitness programs tailored to your goals, fitness level, and preferred training style. Track your progress with detailed metrics, view body changes, and stay motivated with streaks and badges. You can also challenge friends to join your fitness journey.

Highlights
  • Personalized 90-day workout programs
  • In-app progress tracking (weight, reps, PRs)
  • Monthly strength tests
  • Progress picture tool
  • Daily streaks and achievement badges
  • Challenge others feature
  • Diet calculator
Features
Read full description

The 90 Day Challenge App is the perfect workout tool in your pocket and provides you with everything you need to start your own fitness journey. Get your own 90 day programs based on your goals, level, and training style. Stan Browney has done many 90-day transformations with family, friends, and strangers. After seeing their results, so many people requested to help them with their fitness journey. Because it would be impossible to guide everybody personally, we designed this app. Now, you will be able to have your own 90 Day Transformation! Start your 7-Day Free Trial now. OVER 45 TAILORED 90-DAY PROGRAMS Check out the 90 Day Challenge App and pick from over 45 awesome workout programs made just for you! Whether you like to exercise at home, hit the gym, or get moving outside, there’s something for everyone. You can choose to lift weights, use machines, do bodyweight exercises, or mix it up. Set your own goals to build muscle, get stronger, shed pounds, or bulk up. It’s super easy and fun, great for both beginners and experienced people. TRACK YOUR PROGRESS The 90 Day Challenge App has a complete in-app tracking system that allows you to track your weight, reps, personal records, everything! You can easily see your progress for every exercise to know you’re on track to reach your goals. For every 90 day program, you will have monthly strength tests to see the progress you make each month. Additionally, there are fun weekly challenges to keep you active but also help you to see yourself get stronger over time! SEE YOUR BODY CHANGING Within the 90 Day Challenge App, you can take progress pictures with the in-app progress picture tool. You can also create your own “Before and After” that you can share with others. Besides visual changes, you will be able to track your weight, and see your weight changing over time. ALWAYS STAY MOTIVATED Keep your fitness journey fun and rewarding with our daily streaks and achievement badges! Each day you log a workout, you’ll keep your streak going—making it exciting to see how long you can keep it up. With these streaks and badges, you’ll always have a reason to stay motivated and never feel like giving up. As you move along, you'll unlock cool badges for different milestones and challenges. These badges are more than just fun—they celebrate the progress you’re making towards your health and fitness goals. Whether it’s finishing a 90-day challenge, hitting a new personal best, or maintaining a routine of working out three times a week, each badge highlights your enjoyment and commitment in a super fun and easy way. CHALLENGE OTHERS Working out can even be more fun when you do it together with a friend. That is why the 90 Day Challenge App has a built-in feature where you can challenge others to join the exact program that you have. This way you can workout together and keep each other accountable to keep hitting your workouts! CALCULATOR The 90 Day Challenge also has you covered when it comes to diet! With the in-app calorie calculator you can calculate your calorie needs for losing weight, maintaining weight, or gaining weight. You can also determine your macronutrient split and form your own diet goals. RECIPES Within the app, there is an entire library of recipes that are both healthy and delicious that will help you to build muscle and lose fat! These recipes are explained in great detail including the ingredient list and the cooking instructions. LEARN EVERYTHING ABOUT FOOD AND FITNESS You will get access to a library filled with high quality videos explaining everything about working out, recovery, losing or gaining weight, tracking calories, and more! DOWNLOAD NOW FOR A 7-DAY FREE TRIAL Start your own fitness journey with the 90 Day Challenge App. Download now and get your first 7 days for free. Start your 90 Day Challenge today! By creating an account you agree to the Terms of Service which can be found here: https://the90dc.com/terms-of-service

About

Gritzo

This app offers personalized nutritional drinks for children, focusing on height, weight, and immunity. Parents can discover products tailored to their child's age, gender, and growth needs, with exclusive offers and a seamless shopping experience.

Highlights
  • Personalized nutrition recommendations
  • Goal-based product selection
  • Height, weight, and immunity support
  • Exclusive app offers and discounts
  • User-friendly interface
  • Secure payment gateway
Features
Read full description

Gritzo nutritional drinks are crafted to support childrens’ height, weight and immunity. That’s why 1 Lakh+ parents trust Gritzo. Gritzo Range Gritzo SuperMilk Height+ Personalized Protein & Nutrition Drink Mix: It has 13g of protein, calcium, 100% RDA D3, 21 vitamins and minerals with electrolytes, and no added refined sugars and preservatives. Available for different age groups - 13+yrs, 8-12yrs, 4-7yrs. Gritzo Supermilk Overall Growth Protein & Nutrition Drink Mix: With 6g of protein and DHA, calcium,100% RDA D3, 21 vitamins and minerals with electrolytes, it has no added refined sugars and preservatives. Available for different age groups - 13+yrs, 8-12yrs, 4-7yrs. Gritzo SuperMilk Weight+ Personalized Protein & Nutrition Drink Mix: It has 4g of protein and DHA. The personalized ingredients include Ashwagandha, Pre and Probiotic, MCT and Digestive enzymes. Available for different age groups - 13+yrs, 8-12yrs, 4-7yrs. Gritzo SuperMilk Genius Personalized Protein & Nutrition Drink Mix: For memory focus, it has personalized ingredients, including Brahmi, Shankhpushpi, DHA and Vitamin B12. Available for different age groups - 13+yrs, 8-12yrs. What Makes Gritzo Nutritional Drinks So Special? Considering age, gender and growth levels, Gritzo offers personalized nutrition for your child. Some of the features are listed below: Height Growth Immunity Muscle Repair Bone Strength Higher Stamina On the Gritzo App one can find personalized health drinks for children: Goals based product recommendations - Choose products best suited for your child as per age, gender and growth levels. Personalized offers - As you shop more, you get more offers and discounts. Using a user-friendly interface and enhanced app experience Notifications with the latest updates, product launches, promotions, deals, and offers Better visibility of product information and their comparison A seamless shopping experience for parents 2-step easy authentication of products The fast, safe and secure payment gateway for its customers Integration with popular payment options like credit/debit cards, net banking, and UPI, COD, EMI, Amazon Pay, wallet ensuring that customers can make transactions without any hassle App-only offers and extra discounts unavailable on other platforms Exclusive deals and discounts will help parents save money on their purchases and make the shopping experience even more rewarding. Filter your search on the basis of price, age, gender, goals, flavors New product launches and exclusive offers on them Download Gritzo app now and browse through a wide range of products across categories.

Screenshots

90 Day Challenge4 screens
Gritzo4 screens

Verdict

The call

The clearest difference is in-app purchases: Gritzo at none against 90 Day Challenge's 10. Gritzo also leads on ads (none vs shown). 90 Day Challenge's advantage is ratings volume (5K vs 30). On price, rating, review sentiment and update cadence 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. 90 Day Challenge sells 10 in-app purchases, starting at $2.99 per 7 days. Gritzo asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for 90 Day Challenge against 4.8 for Gritzo. That said, the two scores are not equally well evidenced: 90 Day Challenge has 5K ratings behind it against 30, so its average is the more settled of the two. Written reviews are what separate them: 64% of 90 Day Challenge's written reviews are positive against 57% of Gritzo's.

UpkeepUpdate frequency

90 Day Challenge ships an update every 5 days, Gritzo every 10 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
90 Day Challenge versus Gritzo: the parameters behind the verdict, then further details
Parameter90 Day ChallengeGritzo
PriceFreeFree
Rating4.7 (5K ratings)4.8 (30 ratings) — better
Positive reviews64.4% of reviews — better56.5% of reviews
Number of ratings5K — better30
Update frequencyEvery 5 days — betterEvery 10 days
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size240 MB136 MB
Age rating4+4+
DeveloperBrowney B.V.Bright Lifecare Private LTD

Customer experience

90 Day Challenge

All ratings4,990 ratings
Positive92.0%
Neutral3.4%
Negative4.6%
Written reviews721 reviews
Positive64.4%
Neutral11.2%
Negative24.4%

Gritzo

All ratings30 ratings
Positive96.7%
Neutral0.0%
Negative3.3%
Written reviews23 reviews
Positive56.5%
Neutral4.3%
Negative39.1%

Bugs and requests

90 Day Challenge

Reported bugs

4 issues
  • Black screen issue after login
  • Inability to complete workouts or log progress
  • Inconsistent app performance across devices
  • Syncing issues between app and user accounts

Requested features

4 requests
  • More home workout options without equipment
  • Ability to adjust workout schedules and rest days
  • Improved video quality and playback stability
  • Better integration with fitness trackers and smartwatches

Gritzo

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

90 Day Challenge

Subscriptions10
  • WEEKLY7 Days trial$2.997 Days
  • Weekly1 Month trial$5.007 Days
  • WEEKLY7 Days trial$8.997 Days
Show 7 more
  • Monthly1 Month trial$15.001 Month
  • Monthly$15.001 Month
  • MONTHLY7 Days trial$21.991 Month
  • YEARLY$39.001 Year
  • 90 DAYS7 Days trial$49.003 Months
  • YEARLY7 Days trial$99.001 Year
  • Yearly$119.001 Year
None

Gritzo

No in-app purchases

Questions

Is 90 Day Challenge free?
90 Day Challenge is free to download, with in-app purchases available.
Is Gritzo free?
Gritzo is free to download, with no in-app purchases.
Which has better reviews, 90 Day Challenge or Gritzo?
Gritzo is rated higher. 90 Day Challenge averages 4.7 out of 5 from 5K ratings, while Gritzo averages 4.8 from 30 ratings.
Do 90 Day Challenge or Gritzo have ads?
90 Day Challenge shows ads; Gritzo does not.
Which is updated more often, 90 Day Challenge or Gritzo?
90 Day Challenge ships an update every 5 days, and Gritzo every 10 days. Most recently, 90 Day Challenge was updated on November 3, 2026 and Gritzo on October 30, 2026.

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