Comparison

Girths & caliper vs Align Strength Training

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

Head to head
About

Girths & caliper

Track your body composition progress with detailed measurements of skinfolds and girths. Visualize your journey with charts and photos, and integrate with your health data. Easily scan supplements and save your progress securely.

Highlights
  • 16 Girth points
  • 4 Skinfold methods
  • Progress charting
  • Photo integration
  • Health app integration
  • Data export/import
  • Barcode supplement scanner
Features
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Track your body composition with science-backed accuracy. Girths & Caliper (G&C) is the most precise body fat tracker for fitness enthusiasts, athletes and personal trainers. Measure, log and analyze your progress over time using the same methods used in professional fitness assessment. SKINFOLD METHODS Calculate body fat percentage using validated skinfold caliper formulas: • Jackson-Pollock 7-site (men & women) • Jackson-Pollock 3-site (men & women) • Durnin-Womersley 4-site (age-adjusted) • Sloan 2-site (men & women) All formulas use the Siri body density equation to compute body fat %, lean mass and fat mass automatically. GIRTH MEASUREMENTS Record up to 16 circumferences: chest, waist, hips, neck, biceps (left/right, relaxed and flexed), forearms, thighs, calves, wrists. Track asymmetries between left and right side to identify imbalances. PROGRESS PHOTOS Take consistent progress photos with voice-guided body positioning. Compare front, side and back shots over time with a side-by-side view. AI COACH (Premium) Get personalized insights from an AI coach powered by Anthropic Claude. The coach analyzes your real measurement deltas and gives you specific, actionable feedback every 4-5 weeks — when body composition changes are actually measurable. Ask follow-up questions through the in-app chat. CHARTS & TRENDS Visualize every metric over time. Donut charts for body composition breakdown. Line charts for individual measurements. Bar charts for session-to-session comparisons. DATA OWNERSHIP All measurements, photos and analyses are stored locally on your device. We do not collect, sell or track your data. Export everything to CSV anytime. PRIVACY & SECURITY • No accounts, no email signup required • No advertising or third-party tracking • AI requests are anonymized — no name, no email, no device ID is shared • All network traffic is encrypted (HTTPS) WHO IS THIS FOR • Bodybuilders tracking cut/bulk phases • Endurance athletes monitoring lean mass changes • Personal trainers logging client measurements • Anyone serious about quantifying body composition beyond a scale SUBSCRIPTION G&C Standard unlocks the full feature set: • Monthly: €3.99/month • Yearly: €34.99/year (save ~27%) Subscription auto-renews unless cancelled at least 24 hours before the end of the current period. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: see in-app Settings → Privacy Built by a single developer. No ads, no data harvesting, no dark patterns — just the most accurate body composition tracker we could make. Questions? app.user.info@icloud.com

About

Align Strength Training

Features
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This app specializes in coaching people to getting as strong as humanly possible. Through the app, we offer diet and training programs for strength athletes that train in the sports of strongman and powerlifting. Here at Align, we believe in creating a healthy athlete first, then extracting full strength potential. We do this with a blend of restorative based exercises, that are focused on aligning the ankles, knees, hips, and ribcage, so when it is time to push the weights to the max, the athlete is in the best state possible to do so. * App access requires paid coaching plan Terms of use: https://kahunas.io/terms-conditions Privacy policy: https://kahunas.io/privacy

Screenshots

Girths & caliper4 screens
Align Strength Training3 screens

Verdict

The call

The clearest difference is update cadence: Girths & caliper at every 3 weeks against Align Strength Training's every 3 months. Align Strength Training's advantage is iOS requirement (15.0 vs 18.6). On price, 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

Both are free to download. Girths & caliper sells 6 in-app purchases, starting at $3.99 per month and Align Strength Training sells 1 in-app purchase, starting at $350.00 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Girths & caliper ships an update every 3 weeks, Align Strength Training every 3 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
Girths & caliper versus Align Strength Training: the parameters behind the verdict, then further details
ParameterGirths & caliperAlign Strength Training
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS18.615.0 — better
Further details — not scored
Size19 MB56 MB
Age rating12+17+
DeveloperAlberto LunardiniJohn Alimo

In-app purchases

6 purchases

Girths & caliper

Subscriptions2
  • Monthly Subscription$3.991 Month
  • Subscription Yearly$29.991 Year
One-time4
  • Supplement list expanse$0.99
  • All 16 Girths point$1.99
  • Jacson&Polloc Methods$1.99
Show 1 more
  • Unlock all features-remove ads$3.99
1 purchases

Align Strength Training

Subscriptions1
  • Monthly Coaching$350.001 Month

Questions

Is Girths & caliper free?
Girths & caliper is free to download, with in-app purchases available.
Is Align Strength Training free?
Align Strength Training is free to download, with in-app purchases available.
Do Girths & caliper or Align Strength Training have ads?
Neither Girths & caliper nor Align Strength Training shows ads.
Which is updated more often, Girths & caliper or Align Strength Training?
Girths & caliper ships an update every 3 weeks, and Align Strength Training every 3 months. Most recently, Girths & caliper was updated on October 24, 2026 and Align Strength Training on October 28, 2026.

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