Comparison

Sphere vs MinervaOS

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

Head to head
About

Sphere

Effortlessly track your food intake with AI-powered photo logging and instant search. Designed for speed and consistency, it helps you achieve your weight loss, muscle building, or maintenance goals.

Highlights
  • AI-powered photo logging
  • Instant food search
  • Smart auto-add favorites
  • Skip days for tracking breaks
  • Clean daily dashboard
  • Streak tracking
Features
Read full description

The fast calorie tracker, built on USDA data. Say what you ate or snap a photo, and it's logged. Use Sphere free, no subscription and no card. Upgrade to Premium for photo logging, macros and more. JUST SAY WHAT YOU ATE "Two eggs, toast and a coffee." One sentence, no typing, and every food lands in your log. Voice logging is free. Start it from a Lock Screen widget or Control Center, too. FOOD DATA YOU CAN TRUST 12,000 everyday foods measured by the USDA. When a food isn't there, AI fills the gap with an estimate, and you can fix any portion in one tap: cups, ounces, grams or calories. SEARCH THAT PUTS PLAIN FOODS FIRST Everyday foods come before branded products, so the food you meant is usually the top result. MISS A DAY, KEEP YOUR STREAK Earn skip days as you log. Take a day off and your streak is still there when you come back. No reminders on your off days. SAME LUNCH AGAIN? Copy a meal from yesterday and paste it into today. Saved meals and recent foods are one tap away. SET YOUR CALORIE GOAL IN A MINUTE A built-in calorie deficit calculator turns your age, height, weight and pace into a daily target, whether you want to lose, maintain or gain. FREE • Voice logging and food search • Daily calorie goal and deficit calculator • Streaks and skip days • Water tracking • Works offline, syncs when you're back PREMIUM • Photo logging: snap your plate, calories filled in • Barcode scanning • Macro tracking: protein, carbs, fat and more • Progress and weight charts • Apple Health sync Premium is billed through your Apple ID and renews automatically unless you cancel at least 24 hours before the period ends. Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

MinervaOS

This app provides a comprehensive calorie tracking system, calculating both intake and expenditure. It offers personalized burn estimates based on your data and supports numerous wearables for accurate workout tracking. Users can also engage with a social community and view fitness trends over time.

Highlights
  • Comprehensive calorie tracking
  • Personalized calorie burn calculation
  • Wearable device integration
  • Workout data recalculation
  • Social fitness community
  • Fitness trend analysis
Features
Read full description

Your Calorie Tracker Has No Clue What You Burned. MinervaOS Measures It. Most trackers count what you eat and guess the rest. MinervaOS adds up both sides of the day: what you ate, and what your body burned, from resting metabolism and digestion to steps and workouts. Then it learns you from your weigh-ins and corrects the number over time. WHAT YOU EAT Log with a photo, a barcode, the food database, a saved meal, or a sentence to Quick Log. See calories, protein, carbs, fat and micronutrients, with the day's food log underneath. WHAT YOU BURN Your burn, itemized. Basal, workouts, movement and digestion each get their own number, and a tap shows how it is worked out. Log lifts with sets, reps and weight, cardio by time, or the exact calories your machine shows. Add average watts to your rides. WEARABLES AND APPLE HEALTH Connect Apple Health and supported wearables. MinervaOS recalculates workout burn from the raw data instead of taking the device's number as given. PERSONALIZED BURN Weigh in and MinervaOS compares what the math predicted with what the scale showed, then adjusts your burn on a seven-day cycle. TRENDS Daily energy balance, calories eaten, weight and steps over a week, a month or longer. SOCIAL, IF YOU WANT IT Share a meal or a workout with friends, follow people and keep groups. Sharing is optional. MinervaOS requires a subscription to access all features: $9.99 per month or $69.99 per year, each with a 7-day free trial for new subscribers. It renews automatically unless cancelled at least 24 hours before the current period ends. Manage or cancel it any time in your Apple Account settings. Prices shown are in U.S. dollars and may vary by region. Calorie burn and food figures are estimates, not medical advice. Terms of Use: https://minervaos.app/terms Privacy Policy: https://minervaos.app/privacy

Screenshots

Sphere4 screens
MinervaOS4 screens

Verdict

The call

The clearest difference is monetization model: Sphere at freemium against MinervaOS's subscription. Sphere also leads on ads (none vs shown) and rating (5.0 vs 4.8). MinervaOS's advantage is iOS requirement (17.0 vs 26.0). On price, review sentiment, ratings volume and update cadence 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. Sphere sells 2 in-app purchases, starting at $9.99 per month and MinervaOS sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sphere holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Sphere ships an update every 2 days, MinervaOS every 4 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Sphere versus MinervaOS: the parameters behind the verdict, then further details
ParameterSphereMinervaOS
PriceFreeFree
Rating5.0 (4 ratings) — better4.8 (8 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings48 — better
Update frequencyEvery 2 days — betterEvery 4 days
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemium — betterSubscription
DevicesiPhoneiPhone
Requires iOS26.017.0 — better
Further details — not scored
Size44 MB43 MB
Age rating4+12+
DeveloperUpstoryBrizo Finance LLC

Customer experience

Sphere

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

MinervaOS

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Sphere

Subscriptions2
  • Premium Monthly7 Days trial$9.991 Month
  • Premium Annual7 Days trial$59.991 Year
2 purchases

MinervaOS

Subscriptions2
  • Minerva Monthly7 Days trial$9.991 Month
  • Minerva Annual7 Days trial$69.991 Year

Questions

Is Sphere free?
Sphere is free to download, with in-app purchases available.
Is MinervaOS free?
MinervaOS is free to download, with in-app purchases available.
Which has better reviews, Sphere or MinervaOS?
Sphere is rated higher. Sphere averages 5.0 out of 5 from 4 ratings, while MinervaOS averages 4.8 from 8 ratings.
Do Sphere or MinervaOS have ads?
MinervaOS shows ads; Sphere does not.
Which is updated more often, Sphere or MinervaOS?
Sphere ships an update every 2 days, and MinervaOS every 4 days. Most recently, Sphere was updated on October 28, 2026 and MinervaOS on October 31, 2026.

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