Comparison

Weight Tracker vs Spren Body Composition Scanner

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

Head to head
About

Weight Tracker

This app helps you track weight changes by comparing weekly averages, offering a clearer view of your progress beyond daily fluctuations. It uses data visualization, goal setting, and gamified elements to make weight management motivating and fun.

Highlights
  • Weekly average weight comparison
  • Linear regression for trend analysis
  • Goal setting with adherence percentage
  • Interactive data visualization
  • Gamified progress with points and achievements
  • Online leaderboards for competition
Features
Read full description

Your weight fluctuates daily. In contrast to other apps Scelta compares weekly averages and shows your real weight progress! If you have ever used a scale regularly you know this problem: Your weight fluctuates from day to day and it’s difficult to say whether you gained weight, lost weight or just had a heavy day. Salty food, hydration status, sleep, stress, and hormonal fluctuations are just some of the many factors that can influence your weight heavily in the short term. To know what’s really going on you need to compare averages to each other. - eg. the average of the last 14 days to the average of the 14 days before. The difference, also known as delta, between these time spans is a very informative indicator of what really happens to your body weight. Scelta calculates this “scale delta“ for you and makes weight tracking approachable, meaningful, a lot of fun and incredibly motivating. Data visualisation of the next generation: • Your real progress: Scelta compares your average weight for the selected time span to the previous time span, eg. 7 days vs 7 days prior • Linear regression instead of peaks and valleys: A line of best fit shows your actual weight trend graphically • Reach your own goal: select eg. “- 1 lb per week” (or “- 0,5kg per week” depending on your local unit) and see at a glance how good you’re doing by taking a look at your adherence percentage • Hear your weight: Swipe on the graph to see the exact value of a data point and its linear regression, hear and feel (on devices with Taptic Engine) the value of your weight entries (you’ve never seen, heard or felt your weight this way!) • Scelta shows your total progress and how far you have come since you started your goal • After setting a new goal (eg. a lean gaining phase after losing fat) you can still go back to older goals to see your previous progress • See a graph of your goal adherence for every day since you first set your goal. Swiping on it reveals your weekly rate of weight change and how well you adhered to your goal in the 7, 14 oder 30 day average comparison on that day. There has never been anything like it before. And because everything is more fun as a game: • The RPG where you are the main character: Collect Scelta Points by reaching your own goal and level up • Prolific story: Unlock many different achievements for your adhering to your weight adventure • Online leader boards: Compete with your friends or users worldwide to see who accomplishes their personal weight goals best Losing weight on a fat-loss diet, keeping your lean-gaining phase in check or if you’re just trying to maintain your current weight: Weight Tracking has never been this fun! What position will you reach with your personal progress in the leader boards? Download Scelta now and try it today! ——— Scelta integrates with the Apple Health app: Scelta uses the Health app that is pre-installed on your iPhone to show already existing weight data and to save new entries. Because of this Scelta will ask you to grant read- and write-access to your weight data. Your weight is only visible to you and is not sent or visible to anyone but yourself. Achievements you unlock and points you collect to climb the leader boards are a result of how well you adhere to your goals and not your actual weight entries. The goal you set for yourself is not visible to anyone else as well. Scelta Terms of Use - https://www.waldow.app/terms-scelta/ Scelta Privacy Policy - https://www.waldow.app/privacy-scelta/

About

Spren Body Composition Scanner

This app uses your smartphone to measure body fat percentage, BMI, and body composition. It provides detailed health reports, tracks weight loss, and offers personalized nutrition plans, acting as a smart scale alternative with research-grade analysis.

Highlights
  • Body fat percentage measurement
  • BMI calculator
  • Body composition analysis
  • Weight tracking
  • Personalized nutrition planning
  • Multi-page PDF reports
Features
Read full description

Revolutionize your fitness journey with Spren, the ultimate health app and fitness app: • Advanced BMI-Calculator & Body Fat Calculator: Use your smartphone as a body scan tool for accurate body fat percentage and BMI measurements, results are comparable to DEXA scans. • Comprehensive Health App Reports: As a sophisticated body tracker and body measurement tracker, Spren provides detailed insights including body fat percentage, BMI analysis, body composition breakdown • Research-Based Fitness Tracker: Align your results with healthy ranges from extensive research, similar to DEXA scan standards. • Weight Tracker & Weight Loss Tracker: Monitor your weight and track weight loss effectively, going beyond what traditional smart scales offer. • Body Composition Analysis: Understand the nuances of body composition, not just BMI, using Spren as your personal fitness tracker and health app. • Smart Scale Alternative: Experience the convenience of a smart scale combined with the detailed analysis of a professional-grade body fat calculator, scanner, and BMI calculator. • Personalized Nutrition Planning: Set targeted goals and begin tracking toward them today with a data-backed nutrition plan created just for your needs. Get a multi-page PDF report that includes: • Body fat % • Fat mass • Lean mass • A/G fat ratio • Resting metabolic rate Plus, see how your results compare to healthy and optimal ranges from published research. The technology seems magical, but the science behind the imaging algorithm has been validated by several independent peer-reviewed studies, making research-grade body composition analysis accessible to anyone with a smartphone. Spren is more convenient than comparable methods like DEXA and underwater weighing, and the results are more comprehensive and accurate than bathroom scales or other apps. Focusing on weight loss alone may not be helping you achieve your deeper health goals. If you're losing lean mass versus body fat, you're not getting fitter. With Spren you will: • Avoid the confusion and frustration of false plateaus. • Help understand if your nutrition, fitness, and recovery programs are working for you. • Ensure that you're making progress toward your deeper health goals. Discover the true progress of your fat loss, lean gains, metabolic health, and longevity with Spren's research-grade body composition analysis — go beyond the scale and take control of your health journey. Sign up for one of our comprehensive wellness subscriptions and start your journey today. You can cancel at any time. The results provided by this app are intended for informational purposes only and should not be used as a basis for any medical treatment or diagnosis. Terms of service: https://www.spren.com/terms-conditions Privacy policy: https://www.spren.com/privacy-policy Your data is processed securely in the cloud. getsupport@spren.com

Screenshots

Weight Tracker4 screens
Spren Body Composition Scanner4 screens

Verdict

The call

The clearest difference is rating: Spren Body Composition Scanner at 4.7 against Weight Tracker's 4.4. Weight Tracker's advantage is review sentiment (64% vs 46%) and device support (4 vs 1). On price, ratings volume, update cadence 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. Weight Tracker sells 13 in-app purchases, starting at $4.99 per month and Spren Body Composition Scanner sells 14 in-app purchases, starting at $10.49 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Spren Body Composition Scanner holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 1K and 1.5K respectively. Written reviews complicate that: 64% of Weight Tracker's written reviews are positive against 46% of Spren Body Composition Scanner's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Weight Tracker ships an update weekly, Spren Body Composition Scanner every 9 days. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

Scorecard4 real differences · 6 level
Weight Tracker versus Spren Body Composition Scanner: the parameters behind the verdict, then further details
ParameterWeight TrackerSpren Body Composition Scanner
PriceFreeFree
Rating4.4 (1K ratings)4.7 (1.5K ratings) — better
Positive reviews63.8% of reviews — better46.5% of reviews
Number of ratings1K1.5K — better
Update frequencyWeekly — betterEvery 9 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone
Requires iOS15.0 — better17
Further details — not scored
Size131 MB207 MB
Age rating4+17+
DeveloperJoe WaldowElite HRV Inc

Customer experience

Weight Tracker

All ratings1,000 ratings
Positive86.0%
Neutral7.0%
Negative7.0%
Written reviews163 reviews
Positive63.8%
Neutral9.8%
Negative26.4%

Spren Body Composition Scanner

All ratings1,490 ratings
Positive94.6%
Neutral1.5%
Negative4.0%
Written reviews99 reviews
Positive46.5%
Neutral5.1%
Negative48.5%

User reviews

Weight Tracker

From 1K App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Convenient weight tracking
  • 📈 Helpful graphs and data visualization
  • 🎮 Gamification elements are motivating
  • 🤖 Responsive developer support

Room to improve

  • 🐛 Occasional bugs and crashes
  • 🤔 Confusing or complex interface for some users
  • 💰 Paid features could be better value
  • 🔄 Lack of data import/export or syncing options
  • 🕰️ Desire for longer-term historical data

Spren Body Composition Scanner

From 1.5K App Store ratings

What we love

  • 👍 Easy to operate
  • 🚀 Motivating
  • 👍 Incredible app
  • 👍 Accurate
  • 👍 Talks you through the scan

Room to improve

  • 🐛 No login possible
  • 🐛 Doesn't work
  • 🐛 Measurements are nowhere close to DEXA scans
  • 🐛 Can't delete account
  • 🐛 Useless

Bugs and requests

Weight Tracker

Reported bugs

3 issues
  • Watch app crashes on launch
  • Weight data not syncing correctly
  • Unable to edit or delete past entries

Requested features

5 requests
  • Add option to track body fat percentage
  • Improve weight goal setting and customization
  • Provide more flexible data entry and editing
  • Integrate with more third-party health apps
  • Expand historical data and trend analysis

Spren Body Composition Scanner

Reported bugs

11 issues
  • No login possible
  • Doesn't work
  • Measurements are nowhere close to DEXA scans
  • Can't delete account
  • Useless
Show 6 more
  • Gimmicky at best
  • Impossible to get a reading since last update
  • App crashes when trying to set weight above 245lbs
  • Buggy
  • Bad image recognition
  • Doesn't scan under any circumstances

Requested features

3 requests
  • Integration with Apple Health for weight tracking
  • Demo or trial before subscription
  • Monthly subscription option

In-app purchases

13 purchases

Weight Tracker

Subscriptions4
  • Scelta Pro Monthly$4.991 Month
  • Scelta Pro Annually$19.991 Year
  • Scelta Pro Annually$29.991 Year
Show 1 more
  • Scelta Pro7 Days trial$29.991 Year
One-time9
  • Scelta Black Edition Dark Mode$1.99
  • Losing Weight in "Deep Ocean"$1.99
  • Gain Weight in "Gold is best"$1.99
Show 6 more
  • My Weight Diary in Really Red$1.99
  • Weight Tracker in Warp Drive$1.99
  • Small Tip: Cup of Coffee$2.99
  • Big Tip: Pot of Coffee$5.99
  • Weight Tracker Scelta Pro$59.99
  • Scelta Pro Lifetime$59.99
14 purchases

Spren Body Composition Scanner

Subscriptions11
  • Scan Essentials$10.491 Month
  • Monthly$14.991 Month
  • Monthly$19.991 Month
Show 8 more
  • 24/7 AI coaching support$20.991 Month
  • Monthly$24.991 Month
  • Scan Essentials$38.991 Year
  • Quarterly7 Days trial$59.993 Months
  • Annual$69.991 Year
  • Semiannual$89.996 Months
  • Annual7 Days trial$119.991 Year
  • 24/7 AI coaching support$129.001 Year
One-time3
  • Body Composition Analysis$8.99
  • Body Composition Analysis$17.99
  • Body Composition Analysis$35.99

Questions

Is Weight Tracker free?
Weight Tracker is free to download, with in-app purchases available.
Is Spren Body Composition Scanner free?
Spren Body Composition Scanner is free to download, with in-app purchases available.
Which has better reviews, Weight Tracker or Spren Body Composition Scanner?
Spren Body Composition Scanner is rated higher. Weight Tracker averages 4.4 out of 5 from 1K ratings, while Spren Body Composition Scanner averages 4.7 from 1.5K ratings.
Do Weight Tracker or Spren Body Composition Scanner have ads?
Neither Weight Tracker nor Spren Body Composition Scanner shows ads.
Which is updated more often, Weight Tracker or Spren Body Composition Scanner?
Weight Tracker ships an update weekly, and Spren Body Composition Scanner every 9 days. Most recently, Weight Tracker was updated on October 31, 2026 and Spren Body Composition Scanner on November 1, 2026.

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