Comparison

Zempy vs Lean AI

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

Head to head
About

Zempy

Effortlessly track your nutrition by simply taking a photo of your meal. Receive instant, detailed nutritional analysis to help you reach your fitness goals. This intuitive platform simplifies the process, offering insights to support your journey.

Highlights
  • AI-powered calorie tracking
  • Photo-based meal analysis
  • Personalized fitness plans
  • Detailed nutritional breakdown
  • Intuitive user interface
Features
Read full description

HOW TO USE Zempy: Complete a few lifestyle questions to personalize your plan. Take a photo of your meal. Instantly receive a detailed nutritional analysis. Cal AI is designed to help you achieve your fitness goals faster than ever. We simplify the process, providing an intuitive platform that makes tracking your nutrition easy. Our mission is to help you feel confident in your body with minimal time and effort. While you’ll need to put in the work, we're here to support you with the tools and insights to make it happen. DISCLAIMER: We do not provide medical advice. All suggestions should be considered informational, and you should consult a professional and do your own research before starting any new diet or nutritional plan. SUBSCRIPTION REQUIRED FOR DETAILED ANALYSIS. Purchases is needed for use. Privacy Policy: https://catalyticventure.com/privacy-policy Terms of Service: https://heavy-king-6a5.notion.site/Terms-of-Service-e8859fff210d45ac96bda0282c749927?pvs=4

About

Lean AI

Effortlessly track your nutrition and fitness with AI-powered meal analysis. Snap photos of your food or describe your meals for instant calorie and macro breakdowns. Log workouts to monitor your progress and simplify your health journey.

Highlights
  • Snap photos to track macros
  • Scan barcodes for nutrition info
  • Describe meals for AI analysis
  • Log weightlifting and cardio workouts
  • AI-powered nutrition estimation
  • Featured on TikTok
Read full description

Lean AI Take control of your nutrition and fitness with Lean AI, the ultimate app for tracking macros, meals, and workouts. With cutting-edge AI technology, Lean AI makes tracking your meals effortless and accurate, whether you're at home, at the gym, or on the go. Snap to Track Easily track your food with a simple snap! Lean AI analyzes photos of your meals, food packages, nutrition facts, and barcodes, instantly calculating your calories and macros. No more manual input – just point, shoot, and let AI do the rest. Describe Your Meal Don't have a photo? No problem! Simply describe what you're eating, and Lean AI will estimate the nutrition breakdown for you. Whether you're enjoying a homemade dish or dining out, AI-powered meal descriptions make tracking easier than ever. Fitness Tracking Built In Lean AI goes beyond nutrition – it tracks your fitness, too. Log your weightlifting workouts, cardio sessions, or describe your routine, and the app will keep tabs on your progress. Whether you're running, lifting, or resting, Lean AI has your fitness covered. As Seen on TikTok Featured on TikTok, Lean AI is making waves in the fitness and nutrition community. Join thousands of users who are transforming their lives by simplifying their health journey with the power of AI. Why Lean AI? - Snap photos to track macros instantly - Scan barcodes or input nutrition facts with ease - Describe meals for AI-powered nutrition tracking - Track workouts: running, weightlifting, and more - Featured on TikTok for its ease and innovation - Get started today with Lean AI and make nutrition and fitness tracking as easy as snapping a photo! A subscription is required to view analysis results. Consult a doctor for medical advice and before making changes to your diet, exercise, or health routine. Privacy Policy: https://leanai.app/privacy Terms and Conditions: https://leanai.app/terms

Screenshots

Zempy3 screens
Lean AI4 screens

Verdict

The call

The clearest difference is monetization model: Lean AI at free with in-app purchases against Zempy's subscription. Lean AI also leads on rating (4.6 vs 4.2) and review sentiment (75% vs 63%). Zempy's advantage is iOS requirement (13.0 vs 15.5). On price, ratings volume, update cadence 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. Zempy sells 6 in-app purchases, starting at $9.99 per month and Lean AI sells 14 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Lean AI holds the better App Store score, 4.6 against 4.2. Both are backed by a comparable volume of ratings — 38 and 84 respectively. Written reviews point the same way: 63% of Zempy's written reviews are positive against 75% of Lean AI's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on August 31, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 6 level
Zempy versus Lean AI: the parameters behind the verdict, then further details
ParameterZempyLean AI
PriceFreeFree
Rating4.2 (38 ratings)4.6 (84 ratings) — better
Positive reviews62.5% of reviews75.0% of reviews — better
Number of ratings3884 — better
Update frequencyEvery 3 daysEvery 3 days
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.5
Further details — not scored
Size71 MB69 MB
Age rating4+4+
DeveloperCatalytic Venture, Inc.AI Star LLC

Customer experience

Zempy

All ratings38 ratings
Positive76.3%
Neutral7.9%
Negative15.8%
Written reviews16 reviews
Positive62.5%
Neutral18.8%
Negative18.8%

Lean AI

All ratings84 ratings
Positive92.9%
Neutral2.4%
Negative4.8%
Written reviews8 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

6 purchases

Zempy

Subscriptions6
  • Monthly Subscription$9.991 Month
  • Monthly$14.991 Month
  • Yearly OneTimeOffer$19.991 Year
Show 3 more
  • Yearly Subscription$34.991 Year
  • Yearly One-Time-Offer$39.991 Year
  • Yearly$69.991 Year
14 purchases

Lean AI

Subscriptions14
  • All Access for 1 Week$0.997 Days
  • All Access for 1 Week$5.997 Days
  • All Access for 1 Week7 Days trial$7.997 Days
Show 11 more
  • All access$7.997 Days
  • All access3 Days trial$7.997 Days
  • All Access for 1 Month$9.991 Month
  • All access for 1 Month$14.991 Month
  • All access for 1 Year$19.991 Year
  • All Access for 1 Year1 Year trial$29.991 Year
  • All Access for 1 Year$29.991 Year
  • All Access for 1 Year3 Days trial$29.991 Year
  • All Access for 1 Year$39.991 Year
  • All Access for 1 Year3 Days trial$49.991 Year
  • All Access for 1 Year$49.991 Year

Questions

Is Zempy free?
Zempy is free to download, with in-app purchases available.
Is Lean AI free?
Lean AI is free to download, with in-app purchases available.
Which has better reviews, Zempy or Lean AI?
Lean AI is rated higher. Zempy averages 4.2 out of 5 from 38 ratings, while Lean AI averages 4.6 from 84 ratings.
Do Zempy or Lean AI have ads?
Neither Zempy nor Lean AI shows ads.
Which is updated more often, Zempy or Lean AI?
Zempy ships an update every 3 days, and Lean AI every 3 days. Most recently, Zempy was updated on August 31, 2026 and Lean AI on September 21, 2026.

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