Comparison

True Weight vs Photo51

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

Head to head
About

True Weight

This app helps you understand your true weight progress by smoothing out daily fluctuations. It provides insights to tune your diet and stay motivated for long-term results. Track years of data with customizable graphs and easy export options.

Highlights
  • Understand true weight progress
  • Daily energy surplus calculation
  • Record weight in multiple units
  • Store up to 20 years of data
  • Customizable graphs
  • Data backup and import
Features
Read full description

• Understand your weight. • Stay motivated. • Tune your diet. • Get long term results. Keeping track of your diet is difficult. Daily weight fluctuations mask your real progress and make you feel like giving up. Use True Weight and you'll get a clear picture of your progress and stay motivated. Once you understand your True Weight, our 'Daily Energy' value helps you tune your diet without the need for complex calorie counting. Features: • Record in kilograms, pounds, or stones. • Store up to 20 years of weight data. • Withings scale support. • Graphs from 1 month to 20 years. • Full screen landscape graphs. • Easy to read weight change information. • Daily energy surplus calculation. • Backup your data using email or web export. • Import existing data. SUPPORT: If you experience any problems when using True Weight please email us at trueweight@me.com.

About

Photo51

Features
Read full description

Deep within every cell lies the blueprint of you. Our DNA is 99.9% identical, but it’s the final 0.1% that makes you unique and defines who you can become. Your DNA shapes everything - how you age, use energy, respond to stress, and even your mood. How you choose to live can profoundly influence your vitality and longevity. Photo51 decodes your unique biology and reveals how you can reshape the story of you. What you will discover Gene Roadmap: Your personal map of genetic strengths, sensitivities, and predispositions. Reveal how your DNA influences the performance of your body’s essential systems. Your report will include deep insight into: • Cell renewal - Discover how your cells regenerate and renew for long-term vitality. • Detoxification - Learn how your body clears toxins and activates natural antioxidant pathways. • Mood regulation - Understand the genetic signals influencing your mood, focus, and resilience. • Cell maintenance - See how your DNA repair and cell health systems are functioning. • Inflammation control - Uncover how your body manages inflammation and maintains internal balance. • Targeted support - Learn how to support your body according to your unique DNA. BioAge: Understand how you’re body and mind is aging in real time. Many of us age faster biologically than our years suggest. BioAge reveals how your body is truly ageing. • Biological age - Discover your body’s true age. • Pace of ageing - Learn how quickly you are ageing. • Organ system ageing - Uncover which organ systems are ageing fastest. • Stress Gauge - See how stress influences your biology. • Epigenetic Biomarker Analysis - Identify the cellular markers shaping your ageing. • Alcohol Impact score - Understand how alcohol affects your biology. • Targeted support - Learn how to support the biological processes that influence your ageing. This is precision wellbeing at your fingertips. Please seek a doctor's advice in addition to using this app before making any medical decisions.

Screenshots

True Weight4 screens
Photo514 screens

Verdict

The call

The clearest difference is price: Photo51 at Free against True Weight's $0.99. Photo51 also leads on update cadence (every 9 days vs every 6 weeks). True Weight's advantage is iOS requirement (9.3 vs 16.0). On ads, in-app purchases 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

Photo51 is free to download; True Weight costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

True Weight ships an update every 6 weeks, Photo51 every 9 days. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level
True Weight versus Photo51: the parameters behind the verdict, then further details
ParameterTrue WeightPhoto51
Price$0.99Free — better
Rating4.4 (39 ratings) — better—
Positive reviews81.6% of reviews—
Number of ratings39 — better—
Update frequencyEvery 6 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS9.3 — better16.0
Further details — not scored
Size2 MB258 MB
Age rating4+12+
Developermade-up softwareContic

Bugs and requests

True Weight

Reported bugs

3 issues
  • Crashes when entering new weight data
  • Withings scale integration no longer working
  • Incorrect weight unit conversions

Requested features

5 requests
  • Add BMI tracking and visualization
  • Integrate with Apple Health and other fitness apps
  • Expand data history and customizable date ranges
  • Introduce user profiles and multi-user support
  • Add more weight measurement units and conversion options

Photo51

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

True Weight

No in-app purchases

None

Photo51

No in-app purchases

Questions

Is True Weight free?
True Weight costs $0.99, with no in-app purchases.
Is Photo51 free?
Photo51 is free to download, with no in-app purchases.
Do True Weight or Photo51 have ads?
Neither True Weight nor Photo51 shows ads.
Which is updated more often, True Weight or Photo51?
True Weight ships an update every 6 weeks, and Photo51 every 9 days. Most recently, True Weight was updated on November 6, 2026 and Photo51 on November 4, 2026.

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