Comparison

Spren Body Composition Scanner vs ShellShock Trainer

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

ShellShock Trainer

Log your gym sessions, track personal records, and visualize which muscles you've worked. Connect with a supportive community of lifters, share your progress, and discover new training routines.

Highlights
  • Log workouts and sessions
  • Track personal records (PRs)
  • Visualize muscle engagement
  • Connect with a lifting community
  • Save training history
  • Follow other lifters
Features
Read full description

Shell Shock Trainer is the training app from ShellShock Energy. Log workouts, track PRs, see which muscles you hit, and train with a community that actually lifts. WORKOUTS Log lifts and sessions in one place. Keep a training history you can actually use the next time you walk in the gym. PRS AND RANKINGS Save personal records and see how you stack up. Chase numbers, not streaks that reset when you miss a day. MUSCLE MAP See what you trained. The muscle map helps you balance your week instead of repeating the same two movements. COMMUNITY Post, talk shop, and follow other lifters. Report and block are built in so the feed stays usable. ACCOUNT Sign in with Apple. Delete your account from the app when you want out. Camera and photo library are used when you add photos. Shell Shock Trainer is free to download. Version 1.0 has no in-app purchases or subscriptions. ShellShock Energy / Atlas Nutricles LLC

Screenshots

Spren Body Composition Scanner4 screens
ShellShock Trainer4 screens

Verdict

The call

The clearest difference is review sentiment: ShellShock Trainer at 100% against Spren Body Composition Scanner's 46%. ShellShock Trainer also leads on in-app purchases (none vs 14) and rating (5.0 vs 4.7). Spren Body Composition Scanner's advantage is ratings volume (1.5K vs 1). On price, ads and device support 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. ShellShock Trainer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ShellShock Trainer holds the better App Store score, 5.0 against 4.7. 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 100% of ShellShock Trainer's.

UpkeepUpdate frequency

Spren Body Composition Scanner ships an update every 9 days, ShellShock Trainer every 4 days. The most recent releases landed on October 22, 2026 and October 26, 2026 respectively.

Scorecard7 real differences · 3 level
Spren Body Composition Scanner versus ShellShock Trainer: the parameters behind the verdict, then further details
ParameterSpren Body Composition ScannerShellShock Trainer
PriceFreeFree
Rating4.7 (1.5K ratings)5.0 (1 ratings) — better
Positive reviews46.5% of reviews100.0% of reviews — better
Number of ratings1.5K — better1
Update frequencyEvery 9 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPod — better
Requires iOS1715.0 — better
Further details — not scored
Size207 MB8 MB
Age rating17+12+
DeveloperElite HRV IncAtlas Nutricles LLC

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%

ShellShock Trainer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

ShellShock Trainer

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

ShellShock Trainer

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 ShellShock Trainer free?
ShellShock Trainer is free to download, with no in-app purchases.
Which has better reviews, Spren Body Composition Scanner or ShellShock Trainer?
ShellShock Trainer is rated higher. Spren Body Composition Scanner averages 4.7 out of 5 from 1.5K ratings, while ShellShock Trainer averages 5.0 from 1 ratings.
Do Spren Body Composition Scanner or ShellShock Trainer have ads?
Neither Spren Body Composition Scanner nor ShellShock Trainer shows ads.
Which is updated more often, Spren Body Composition Scanner or ShellShock Trainer?
Spren Body Composition Scanner ships an update every 9 days, and ShellShock Trainer every 4 days. Most recently, Spren Body Composition Scanner was updated on October 22, 2026 and ShellShock Trainer on October 26, 2026.

Other comparisons