Comparison

Slym vs CalKit

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

Head to head
About

Slym

This app simplifies weight loss by focusing on a single principle: consuming fewer calories than your body burns. It provides essential information for achieving personal weight goals without distractions or gimmicks, leveraging a vast food database and barcode scanning for easy logging.

Highlights
  • Calorie tracking
  • Food & nutrition database
  • Barcode scanning
  • Personalized weight loss plan
  • Weight logging
  • Meal reminders
  • Dark mode
Features
Read full description

Slym is designed to make weight loss simple for everyone. Losing weight is made easiest when there is a clear and concise goal that is proven to work. There is only one rule; you must eat fewer calories than your body burns. Slym takes full advantage of this simple fact and only surfaces the information that you need to attain your personal weight goal. No distractions, no gimmicks, just science. Many of us vastly underestimate how many calories are in the foods that we eat. Quick searching, discovery, and privacy are core to Slym. Whether you're beginning a life-changing weight loss journey; or simply wanting to lose those stubborn love handles, Slym will help you become a healthier you. - FOOD & NUTRITION • Quickly search through the #1 food and nutrition database in the world. All of the major brands, restaurant chains, groceries, and more can be found in seconds. BARCODE SCANNING • In a rush or have many food items to log? Quickly scan the barcode to skip the already fast searching process. PRIVACY • There are few things more personal to us than our health. Slym is requesting the absolute minimum amount of information required to properly and effectively calculate your personalized health plan. Slym will never share your private biological information with third parties. • Make use of Sign in with Apple to secure your sensitive information with the trust and authority of Apple. PERSONALIZED WEIGHT LOSS PLAN • Slym utilizes proven science to determine the exact amount of calories that you can eat each day to attain your specific weight loss goals. • Easily view the number of calories that you have remaining in your "daily budget". This number is calculated specifically for you based on just a few health factors. NOTIFICATIONS • Eating at consistent times every day is key to maintaining a healthy metabolism, sleep pattern, and overall health. Not everyone eats breakfast at the same time, so set a reminder that fits your schedule and your lifestyle. WEIGHT LOG • Consistently checking your weight is one of the easiest and most effective ways to keep yourself accountable. Logging weight entries often helps keep you accountable, and also provides a great visualization of your hard work paying off! DARK MODE • Built for those midnight snacks and dark mode lovers.

About

CalKit

This app helps you achieve your health goals by tracking calories and nutrition. It features a TDEE calculator, barcode scanner for food, and tools to monitor carbs and other essential nutrients.

Highlights
  • Calorie tracking
  • Nutrition tracking
  • TDEE calculator
  • Barcode food scanner
  • Carbohydrate monitoring
  • Personalized diet plans
Features
Read full description

Whether you want to lose weight, build muscle, or maintain a healthier lifestyle, CalorieKit gives you the tools to stay on track with your nutrition goals. Your daily calorie and macro budget is built for your body not a generic 2,000. Tell us your height, weight, goal, and pace during onboarding, and CalorieKit (CalKit) turns that into a plan you can follow, with a projected date to reach your target weight. LOG MEALS YOUR WAY • AI meal estimates - describe a meal in text, snap a photo, or dictate it by voice and get calories plus protein, carbs, and fat in seconds • Food search - look up branded and generic foods from a large nutrition database • Barcode scanner - scan packaged foods to log them fast • Manual entry - add custom foods and portions when you already know the numbers STAY ON TRACK EVERY DAY • Home dashboard with calories remaining, macro breakdown, and meal-by-meal progress • Daily journal to review everything you logged • Water intake tracker with a customizable daily goal • Logging streaks with streak-shield protection after a 7-day run • Meal reminders and streak-at-risk alerts so you do not lose momentum SEE THE FULL PICTURE • Analytics dashboard with energy balance, weight trends, and habit insights (unlocks after 7 days of logging) • Rhythm insights that connect meal timing, eating windows, and sleep from Apple Health • Steps and active calorie burn when Apple Health is connected • Achievements and membership ranks as you build consistency DESIGNED TO FIT YOUR ROUTINE • Syncs with Apple Health to read steps, workouts, weight, and energy burn, and write dietary nutrition back when you choose • Cloud backup keeps your profile, settings, and logs in sync across devices • Clean, focused interface built for quick daily logging If you have any suggestions or questions, please email us at hello@getcalkit.com Contact Us: support@getcalkit.com Privacy Policy: https://docs.everoasistech.com/privacy-policy Terms of Use: https://docs.everoasistech.com/terms-of-service *Note: App requires to have a subscription with free trial to access the features and contents of the app. Not intended for medical purposes. Take all the recommendations as a suggestions, please consult with a professional and do your own research before trying a new calorie and nutrient plan. Features subject to change. Nutritional data shown in the app is provided by FatSecret.

Screenshots

Slym4 screens
CalKit4 screens

Verdict

The call

The clearest difference is in-app purchases: Slym at none against CalKit's 3. Slym also leads on ratings volume (150 vs 14) and iOS requirement (13.2 vs 26.6). CalKit's advantage is review sentiment (60% vs 38%). On price, rating, ads and monetization model 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. CalKit sells 3 in-app purchases, starting at $4.99 per 7 days. Slym asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.2 for Slym against 4.2 for CalKit. That said, the two scores are not equally well evidenced: Slym has 150 ratings behind it against 14, so its average is the more settled of the two. Written reviews are what separate them: 38% of Slym's written reviews are positive against 60% of CalKit's.

Scorecard4 real differences · 6 level
Slym versus CalKit: the parameters behind the verdict, then further details
ParameterSlymCalKit
PriceFreeFree
Rating4.2 (150 ratings) — better4.2 (14 ratings)
Positive reviews37.9% of reviews60.0% of reviews — better
Number of ratings150 — better14
Update frequency—Every 5 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPod — betteriPhone
Requires iOS13.2 — better26.6
Further details — not scored
Size20 MB93 MB
Age rating12+17+
DeveloperCooper Labs LLCKamani Aravind Chowdary

Customer experience

Slym

All ratings151 ratings
Positive81.5%
Neutral3.3%
Negative15.2%
Written reviews29 reviews
Positive37.9%
Neutral0.0%
Negative62.1%

CalKit

All ratings14 ratings
Positive78.6%
Neutral0.0%
Negative21.4%
Written reviews20 reviews
Positive60.0%
Neutral15.0%
Negative25.0%

Bugs and requests

Slym

Reported bugs

13 issues
  • Login button does nothing
  • Cannot create account
  • App crashes on open
  • Sign up screen stuck
  • App won't open
Show 8 more
  • Cannot sign in
  • Sign in page locked up
  • App won't let me login
  • Cannot get past login screen
  • Initial page doesn't load
  • Sign up button unresponsive
  • Cannot sign up
  • Flashing button, nothing happens

Requested features

5 requests
  • Carb count feature
  • Ability to input calories burned
  • Ability to set target calorie intake
  • Add recipe calorie count
  • Simple tutorial or FAQs

CalKit

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Slym

No in-app purchases

3 purchases

CalKit

Subscriptions3
  • CalorieKit Premium Weekly$4.997 Days
  • CalorieKit Premium Monthly$9.991 Month
  • CalorieKit Premium Annual7 Days trial$49.991 Year

Questions

Is Slym free?
Slym is free to download, with no in-app purchases.
Is CalKit free?
CalKit is free to download, with in-app purchases available.
Which has better reviews, Slym or CalKit?
Slym is rated higher. Slym averages 4.2 out of 5 from 150 ratings, while CalKit averages 4.2 from 14 ratings.
Do Slym or CalKit have ads?
Neither Slym nor CalKit shows ads.

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