Comparison

Spren Body Composition Scanner vs The Longevity AI

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

The Longevity AI

This app helps you improve your longevity through data-driven insights across activity, diet, sleep, and mindfulness. Connect your wearable to discover your biological age and receive personalized coaching to help lower it over time.

Highlights
  • Data-driven longevity insights
  • Biometric and visual AI analysis
  • Wearable device integration
  • Biological age discovery
  • Personalized coaching
  • Focus on Activity, Diet, Sleep, Mindfulness
Read full description

Take meaningful, data-driven steps across the four core pillars of longevity: Activity, Diet, Sleep, and Mindfulness. With biometric and visual AI, it’s simple to join the longevity movement - just connect your wearable and start gaining real insights. Discover your biological age and access personalized coaching designed to help you lower it over time. Best of all, there are no ads or in-app purchases - every core feature is free for life.

Screenshots

Spren Body Composition Scanner4 screens
The Longevity AI4 screens

Verdict

The call

The clearest difference is rating: Spren Body Composition Scanner at 4.7 against The Longevity AI's 3.7. Spren Body Composition Scanner also leads on ratings volume (1.5K vs 3). The Longevity AI's advantage is in-app purchases (none vs 10) and device support (3 vs 1). On price, 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. Spren Body Composition Scanner sells 10 in-app purchases, starting at $10.49 per month. The Longevity AI 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 3.7. That said, the two scores are not equally well evidenced: Spren Body Composition Scanner has 1.5K ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

Spren Body Composition Scanner ships an update every 9 days, The Longevity AI every 6 days. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 4 level
Spren Body Composition Scanner versus The Longevity AI: the parameters behind the verdict, then further details
ParameterSpren Body Composition ScannerThe Longevity AI
PriceFreeFree
Rating4.7 (1.5K ratings) — better3.7 (3 ratings)
Positive reviews46.5% of reviews—
Number of ratings1.5K — better3
Update frequencyEvery 9 daysEvery 6 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS1713.0 — better
Further details — not scored
Size207 MB135 MB
Age rating17+17+
DeveloperElite HRV IncLongr UK Ltd.

Customer experience

Spren Body Composition Scanner

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

The Longevity AI

All ratings1 ratings
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

The Longevity AI

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Spren Body Composition Scanner

Subscriptions9
  • Scan Essentials$10.491 Month
  • Monthly$14.991 Month
  • Monthly$19.991 Month
Show 6 more
  • 24/7 AI coaching support$20.991 Month
  • Scan Essentials$38.991 Year
  • Quarterly7 Days trial$59.993 Months
  • Annual$69.991 Year
  • Annual7 Days trial$119.991 Year
  • 24/7 AI coaching support$129.001 Year
One-time1
  • Body Composition Analysis$17.99
None

The Longevity AI

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 The Longevity AI free?
The Longevity AI is free to download, with no in-app purchases.
Which has better reviews, Spren Body Composition Scanner or The Longevity AI?
Spren Body Composition Scanner is rated higher. Spren Body Composition Scanner averages 4.7 out of 5 from 1.5K ratings, while The Longevity AI averages 3.7 from 3 ratings.
Do Spren Body Composition Scanner or The Longevity AI have ads?
Neither Spren Body Composition Scanner nor The Longevity AI shows ads.
Which is updated more often, Spren Body Composition Scanner or The Longevity AI?
Spren Body Composition Scanner ships an update every 9 days, and The Longevity AI every 6 days. Most recently, Spren Body Composition Scanner was updated on November 7, 2026 and The Longevity AI on October 30, 2026.

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