Comparison

Spren Body Composition Scanner vs retimer

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

Head to head
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

About

retimer

This app helps manage and monitor your circadian rhythm to improve sleep and energy levels. It works with a light therapy wearable to address issues like jet lag, irregular work hours, and general sleep difficulties.

Highlights
  • Circadian rhythm management
  • Sleep monitoring
  • Energy level improvement
  • Jet lag adjustment
  • Light therapy integration
Features
Read full description

Sleep Better, Feel Energized, Be Your Best Self: Welcome to the cutting-edge approach to wellness with retimer app. retimer app together with our Re-Timer light therapy wearable provides a simple method to manage, monitor & align your circadian rhythm with your lifestyle challenges – jet lag, odd working hours, inability to sleep or awaken on time, & poor sleep in general.

Screenshots

Spren Body Composition Scanner4 screens

Verdict

The call

The clearest difference is review sentiment: Spren Body Composition Scanner at 46% against retimer's 0%. Spren Body Composition Scanner also leads on rating (4.7 vs 2.0) and ratings volume (1.5K vs 1). retimer's advantage is in-app purchases (none vs 14) and device support (3 vs 1). 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. Spren Body Composition Scanner sells 14 in-app purchases, starting at $10.49 per month. retimer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Spren Body Composition Scanner holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: Spren Body Composition Scanner has 1.5K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 46% of Spren Body Composition Scanner's written reviews are positive against 0% of retimer's.

UpkeepUpdate frequency

Spren Body Composition Scanner ships an update every 9 days, retimer every 3 weeks. The most recent releases landed on October 16, 2026 and October 4, 2026 respectively.

Scorecard8 real differences · 2 level
Spren Body Composition Scanner versus retimer: the parameters behind the verdict, then further details
ParameterSpren Body Composition Scannerretimer
PriceFreeFree
Rating4.7 (1.5K ratings) — better2.0 (1 ratings)
Positive reviews46.5% of reviews — better0.0% of reviews
Number of ratings1.5K — better1
Update frequencyEvery 9 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS1713.0 — better
Further details — not scored
Size207 MB108 MB
Age rating17+4+
DeveloperElite HRV IncRe-Time Pty Ltd

Customer experience

Spren Body Composition Scanner

All ratings1,486 ratings
Positive94.5%
Neutral1.5%
Negative4.0%
Written reviews99 reviews
Positive46.5%
Neutral5.1%
Negative48.5%

retimer

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

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

retimer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

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
None

retimer

No in-app purchases

Questions

Is Spren Body Composition Scanner free?
Spren Body Composition Scanner is free to download, with in-app purchases available.
Is retimer free?
retimer is free to download, with no in-app purchases.
Which has better reviews, Spren Body Composition Scanner or retimer?
Spren Body Composition Scanner is rated higher. Spren Body Composition Scanner averages 4.7 out of 5 from 1.5K ratings, while retimer averages 2.0 from 1 ratings.
Do Spren Body Composition Scanner or retimer have ads?
Neither Spren Body Composition Scanner nor retimer shows ads.
Which is updated more often, Spren Body Composition Scanner or retimer?
Spren Body Composition Scanner ships an update every 9 days, and retimer every 3 weeks. Most recently, Spren Body Composition Scanner was updated on October 16, 2026 and retimer on October 4, 2026.

Other comparisons