Comparison

Gain Weight vs AI Calorie Tracker & Dietitian

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

Head to head
About

Gain Weight

This app helps users track calorie intake specifically for gaining weight and muscle mass. It offers quick meal logging via photo recognition and provides personalized targets based on user stats and goals. Data is kept private on the device with optional iCloud sync.

Highlights
  • Bulk-first calorie targets
  • AI-powered photo meal logging
  • One-gesture logging for weight and portions
  • Clear home screen with daily progress
  • Trend-based weight tracking
  • Privacy-focused, no account needed
Features
Read full description

StackCal is the calorie tracker built for bulking, not cutting. Most nutrition apps assume you're trying to lose weight. StackCal flips the script. If you're trying to gain muscle, gain mass, or just stop under-eating, StackCal answers the one question that actually matters: "How much more do I need to eat today?" WHY STACKCAL - Bulk-first targets — Personalized BMR, TDEE, and surplus calculations based on your stats and goals. - 5–10 second logging — Snap a photo of your meal and let AI recognize the food and estimate calories. No barcode scanning, no database fumbling. - One dial for everything — Log weight and adjust portion sizes with the same analog dial. One gesture to learn. - Nothing hidden — Today's calories, what you ate, and your weight all live on the home screen. - Trend-based weight — See your moving average instead of fighting daily fluctuations. DESIGNED FOR CLARITY Three rules guide every screen: information is never hidden, the same gesture always means the same thing, and every tap produces a visible response. The result is an app you can use one-handed, post-workout, with sweaty fingers. PRIVACY FIRST - No account required. - Your meals, weight, and profile stay on your device. - Optional iCloud sync uses your private CloudKit container — we never see your data. - No ads. No IDFA. No tracking pixels. SUBSCRIPTION A free tier covers core logging. The subscription unlocks photo-based food recognition and advanced trend analysis. Cancel anytime in iOS Settings. Built for lifters who eat to grow. TERMS OF USE Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

AI Calorie Tracker & Dietitian

Features
Read full description

Calorie Tracker is the private AI calorie counter that runs entirely on your iPhone. Snap a photo, scan a barcode, speak or type what you ate, and get calories, protein, carbs and fat in seconds. Then ask your AI Coach what to eat next. Everything is analyzed on-device by Apple Intelligence: no account, no cloud AI, no uploads. Most AI calorie apps send your meal photos to a server. Calorie Tracker doesn't. Every scan, voice log and Coach chat is processed locally, so your food diary stays yours and AI works even in airplane mode. WHY CALORIE TRACKER • AI Food Scanner: point your camera at a plate, a restaurant dish or a nutrition label. On-device AI breaks down the calories and macros. • Barcode Scanner: scan packaged foods for exact nutrition facts. • Voice & Text Logging: say "two eggs and a coffee" and it's logged. • Private AI Coach: ask what to eat next and get feedback on your day. Every reply is generated on your phone. • Smart Goals: enter your weight, height and target, and get a daily calorie and macro plan. • Apple Health Sync: reads weight and body data, writes back nutrition. • Progress Charts: weight, body fat, macro trends and a daily Nutrition Score. PRIVATE BY DESIGN • 100% on-device AI powered by Apple Intelligence • Meal photos, voice and chats never leave your iPhone • No sign-up and no account • Optional iCloud sync to your own private iCloud • Barcode lookups send only the barcode number to the free Open Food Facts database BUILT FOR YOUR GOALS • Weight Loss: a sustainable calorie deficit with macros that protect lean muscle • Muscle Gain: hit your protein target every day • Maintenance: stay in your zone without obsessing over numbers • Keto, low-carb and intermittent fasting friendly FULL-PICTURE NUTRITION • Calories, protein, carbs, fat, fiber and sugar • Vitamins and minerals • Custom macro splits or smart defaults • Daily, weekly and monthly insights REQUIREMENTS Requires an iPhone with Apple Intelligence (iPhone 15 Pro or later) on iOS 27 or later, with Apple Intelligence turned on. All AI runs on your device. There is no online AI. CALORIE TRACKER PLUS Unlock unlimited AI photo scans, voice logs, the AI nutrition coach, advanced analytics and unlimited history. • Weekly, Monthly and Yearly plans • Cancel anytime in Settings • Subscription renews automatically until canceled Terms of Use: https://calorie-tracker-private-ai.vercel.app/terms Privacy Policy: https://calorie-tracker-private-ai.vercel.app/privacy Questions or feedback? Email coduy96@gmail.com. We read every message.

Screenshots

Gain Weight4 screens
AI Calorie Tracker & Dietitian4 screens

Verdict

The call

The clearest difference is update cadence: Gain Weight at daily against AI Calorie Tracker & Dietitian's every 5 days. Gain Weight also leads on iOS requirement (17.0 vs 27.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Gain Weight sells 2 in-app purchases, starting at $9.99 per month and AI Calorie Tracker & Dietitian sells 4 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Gain Weight ships an update daily, AI Calorie Tracker & Dietitian every 5 days. The most recent releases landed on October 2, 2026 and October 17, 2026 respectively.

Scorecard2 real differences Ā· 5 level
Gain Weight versus AI Calorie Tracker & Dietitian: the parameters behind the verdict, then further details
ParameterGain WeightAI Calorie Tracker & Dietitian
PriceFreeFree
Update frequencyDaily — betterEvery 5 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhoneiPhone
Requires iOS17.0 — better27.0
Further details — not scored
Size17 MB12 MB
Age rating4+12+
DeveloperMoo & CompanyCo Trinh Hien Duy

In-app purchases

2 purchases

Gain Weight

Subscriptions2
  • StackCal Pro ęœˆé”ćƒ—ćƒ©ćƒ³7 Days trial$9.991 Month
  • StackCal Pro å¹“é”ćƒ—ćƒ©ćƒ³7 Days trial$49.991 Year
4 purchases

AI Calorie Tracker & Dietitian

Subscriptions3
  • Voidpen Plus Weekly$3.997 Days
  • Voidpen Plus Monthly$11.991 Month
  • Voidpen Plus Yearly$31.991 Year
One-time1
  • Calorie Tracker Plus Lifetime$99.99

Questions

Is Gain Weight free?
Gain Weight is free to download, with in-app purchases available.
Is AI Calorie Tracker & Dietitian free?
AI Calorie Tracker & Dietitian is free to download, with in-app purchases available.
Do Gain Weight or AI Calorie Tracker & Dietitian have ads?
Neither Gain Weight nor AI Calorie Tracker & Dietitian shows ads.
Which is updated more often, Gain Weight or AI Calorie Tracker & Dietitian?
Gain Weight ships an update daily, and AI Calorie Tracker & Dietitian every 5 days. Most recently, Gain Weight was updated on October 2, 2026 and AI Calorie Tracker & Dietitian on October 17, 2026.

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