Comparison

NutrientOS vs Caltopia

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

Head to head
About

NutrientOS

Track your nutrition, understand your meals, and build healthier habits with food logging, macro and micronutrient tracking, and workout logging. Optional AI tools offer advanced guidance and insights for personalized wellness.

Highlights
  • Food diary with calories, macros, and micronutrients
  • Barcode and food search
  • Restaurant menu browsing
  • Fitness, hydration, and sleep tracking
  • AI meal scan
  • AI Coach for guidance
  • AI recipe builder
Features
Read full description

NutrientOS is a calorie counter, macro tracker, micronutrient tracker, food scanner, workout log, and progress tracker built for people who want more than basic food logging. Track calories, protein, carbohydrates, fat, vitamins, minerals, meals, workouts, recovery, biometrics, and long-term progress in one place. Search foods, scan barcodes, create recipes, compare restaurant meals, and review detailed nutrition insights to better understand what you eat. FOOD, CALORIE, AND MACRO TRACKING • Log meals with a detailed food diary • Track calories, protein, carbohydrates, fat, and micronutrients • Search foods and scan product barcodes • Create custom foods and recipes • Save favorites and schedule recurring foods • Review recent foods for faster logging • Track serving sizes, grams, and portions DETAILED NUTRITION INSIGHTS • View vitamins, minerals, amino acids, and nutrient coverage • Review food grades and ingredient-based food-quality insights • See satiety, absorption, and food-pairing information • Identify nutrient gaps and food sources • Review daily and longer-term nutrition trends • Understand when nutrient information is estimated or unavailable RESTAURANT NUTRITION • Browse restaurant menus • Search thousands of menu items • Compare meals side by side • Sort by calories, protein, sodium, food grade, and protein density • Find options that better match your nutrition goals FITNESS, RECOVERY, AND PROGRESS • Log workouts and training sessions • Track weight and body measurements • Record water, supplements, sleep, mood, energy, and recovery • Track supported biometrics and custom health metrics • Review nutrition, training, and recovery patterns over time • Connect supported Apple Health data IMPORT AND EXPORT • Import supported MyFitnessPal data • Import supported Cronometer data • Export your personal NutrientOS data • Keep your existing nutrition history in one place NUTRIENTOS PRO AND PREMIUM NutrientOS Pro and NutrientOS Premium require an additional in-app purchase. Paid features may include: • AI Meal Scan for estimating food and nutrition from a photo • NutrientOS Coach for nutrition and fitness guidance • AI Recipe Builder • AI meal-plan generation • AI training-plan generation • Body-composition photo analysis • Weekly nutrition and progress checkups • Advanced nutrition, training, and recovery insights • Interactive charts and longer reporting ranges • Higher AI usage limits SUBSCRIPTIONS NutrientOS Pro and NutrientOS Premium are optional auto-renewable subscriptions. Payment is charged to your Apple ID account after purchase confirmation. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription in your App Store account settings. IMPORTANT INFORMATION NutrientOS is intended for informational wellness, nutrition, and fitness tracking. It does not provide medical diagnosis, medical treatment, or medical advice. AI-generated estimates and guidance may be incomplete or inaccurate and should be reviewed before use. Consult a qualified healthcare professional regarding medical concerns or major changes to your diet or exercise routine. Terms of Use: https://nutrientos.com/terms Privacy Policy: https://nutrientos.com/privacy

About

Caltopia

This app offers private, offline calorie and macro tracking with an on-device AI coach for personalized insights and recipes. It supports voice logging, intermittent fasting, and GLP-1 tracking, with data securely stored on your device. Import data from other services and export your logs in various formats.

Highlights
  • Offline calorie and macro tracking
  • On-device AI coach for insights and recipes
  • Voice logging and nutrition label OCR
  • Intermittent fasting timer
  • GLP-1 tracking
  • Data import from MyFitnessPal
  • Adaptive calorie and macro targets
Features
Read full description

Caltopia is a private, offline calorie tracker, macro counter, and food diary — with an on-device AI coach, voice logging, intermittent fasting, and GLP-1 tracking built in. Try everything free for 7 days, then $1.99/month — or pay once ($20) and own it for life. No ads, no accounts, no third-party cloud. Your data stays on your phone. 48,000 FOODS, OFFLINE A USDA + branded-foods database downloads on first launch (~4 MB). After that, search, logging, and charts all work with no internet — on a flight, in the gym, anywhere. LOG A MEAL FIVE WAYS • Barcode scan for packaged food • Voice: "two eggs and a slice of toast" — parsed on-device • Photo of your meal — on-device AI suggests it • Nutrition-label OCR • One tap on a recent food Food data: USDA (public domain, bundled offline) + Open Food Facts. ON-DEVICE AI COACH Ask about your own log — "how much protein did I average?" — and get answers from your data (observations, never medical advice). Say what's in your fridge and get a recipe you can log or save. Uses Apple Intelligence where available, a built-in offline cookbook everywhere else. VOICE LOGGING Tap the mic or the Home Screen widget and just talk. It understands quantities and units — even "a beef stick, 100 calories." Your voice never leaves the phone. INTERMITTENT FASTING A live fasting timer in your calorie ring and on the Lock Screen (Dynamic Island). 16:8, 18:6, 20:4, OMAD, or any custom target, with trends and weekly summaries. TRACK WHAT MATTERS TO YOU Workouts, blood glucose, and GLP-1 (doses, injection-site rotation, side effects) — all user-entered, no medical advice. Build your own recipes and plan meals ahead. ADAPTIVE TARGETS Start with Mifflin–St Jeor BMR + activity multipliers. Turn on Adaptive TDEE and Caltopia learns your real calorie burn from your logs and weight trend, adjusting targets automatically. Pick a goal: lose, maintain, gain, or recomp. INSIGHTS & WIDGETS A 13-week logging heatmap, calorie/macro/water/weight trend charts, and weekly summaries. Home Screen and Lock Screen widgets for calories, macros, water, fasting, and your streak. STAY MOTIVATED 60 achievements, weekly quests, daily challenges, streaks, XP, and levels — fun on top of the data, not in place of it. PRIVATE BY DEFAULT No account. No login. No analytics or ad trackers. Data is stored locally with Apple's SwiftData. Optional backup goes only to your own private iCloud, never our servers. Two-way Apple Health sync. Full Excel export and re-import anytime. PRICING & FREE TRIAL Start with a 7-day free trial — every feature unlocked. Then Caltopia Pro is $1.99/month, or unlock for life with a single $20 purchase. The monthly plan auto-renews unless canceled at least 24 hours before the period ends; manage or cancel anytime in your App Store settings. Lifetime is a one-time purchase, no recurring charges. Privacy Policy: https://caltopia.org/privacy/ Terms of Use (EULA): https://caltopia.org/terms/ Caltopia is a wellness self-tracking tool. It is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult a healthcare professional before changing your diet, exercise, or medication routine.

Screenshots

NutrientOS4 screens
Caltopia4 screens

Verdict

The call

The clearest difference is update cadence: Caltopia at every 3 days against NutrientOS's fortnightly. Caltopia also leads on ratings volume (7 vs 1). NutrientOS's advantage is monetization model (free with in-app purchases vs paid) and iOS requirement (15.0 vs 17.0). On price, rating, review sentiment 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. NutrientOS sells 2 in-app purchases, starting at $7.99 per month and Caltopia sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for NutrientOS against 5.0 for Caltopia. That said, the two scores are not equally well evidenced: Caltopia has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

NutrientOS ships an update fortnightly, Caltopia every 3 days. The most recent releases landed on September 19, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 6 level
NutrientOS versus Caltopia: the parameters behind the verdict, then further details
ParameterNutrientOSCaltopia
PriceFreeFree
Rating5.0 (1 ratings)5.0 (7 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings17 — better
Update frequencyFortnightlyEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size22 MB10 MB
Age rating17+12+
DeveloperJeremiyah EscobedoCOLE SHANE WILLIAMS

Customer experience

NutrientOS

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

Caltopia

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

NutrientOS

Subscriptions2
  • Atlas Pro Monthly$7.991 Month
  • Atlas Premium Monthly$12.991 Month
1 purchases

Caltopia

One-time1
  • Caltopia Unlock$9.99

Questions

Is NutrientOS free?
NutrientOS is free to download, with in-app purchases available.
Is Caltopia free?
Caltopia is free to download, with in-app purchases available.
Which has better reviews, NutrientOS or Caltopia?
NutrientOS and Caltopia are both rated 5.0 out of 5 on the App Store, from 1 and 7 ratings respectively.
Do NutrientOS or Caltopia have ads?
Neither NutrientOS nor Caltopia shows ads.
Which is updated more often, NutrientOS or Caltopia?
NutrientOS ships an update fortnightly, and Caltopia every 3 days. Most recently, NutrientOS was updated on September 19, 2026 and Caltopia on September 21, 2026.

Other comparisons