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Report updated May 19, 2026

Protein Tracker & Calculator is an established health & fitness app that is completely free. With a 4.1/5 rating from 60 reviews, it shows polarized user reception.

What is Protein Tracker & Calculator?

ProtX is a health-tracking app for iOS that uses AI to estimate protein and calorie content from food photos.

Users hire ProtX to simplify the friction of nutritional logging, aiming to hit fitness goals without the manual effort of traditional food diaries.

Current Momentum

v1.1 · 1mo ago

Maintenance
  • Last major update February 2026.
  • Maintains consistent free-access model.

Active Nemesis

Suavita: Fasting Tracker App

Suavita: Fasting Tracker App

By BerthX

Other Rivals

Life Fasting Tracker
Roman: budget weight loss
DASH Diet Plan - Food Tracker
Fiber Tracker | Plant Power
Persona Nutrition
USANA
Teamworks Nutrition
Plack: Microplastics Scanner

7-Day Rank Pulse 🇺🇸

Health & Fitness

No ranking data

Rating Pulse 🇺🇸

What makes this app unique?

What Does It Look Like?

Loading...

What Are The Key Features?

AI Protein IdentifierDifferentiator

Computer vision model analyzes food photos to estimate protein and calorie content

Personalized Protein CalculatorStandard

Algorithm calculates daily protein targets based on user weight and fitness goals

Apple Health IntegrationStandard

Syncs nutrition data with Apple Health and Fitness platforms

How much does it cost?

Free
  • Free access to all features

The app currently operates on a free model with no visible IAP or subscription gates.

Who Built It?

Prometheus Interactive LLC app icon 1
Prometheus Interactive LLC app icon 2
Prometheus Interactive LLC app icon 3
Prometheus Interactive LLC app icon 4

Acquiring and evolving mobile applications to unlock their full potential. They specialize in optimizing utility and lifestyle apps for broader reach.

Portfolio

13

Apps

Free 12
Photo & Video8%
Navigatie8%
Health & Fitness8%

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Explore the full Prometheus Interactive report

Portfolio breakdown, audience, momentum, and every app published by Prometheus Interactive.

Go deeper

What is the competitive landscape for Protein Tracker & Calculator?

Where is it available?

Localized markets (10)

United StatesBrazilGermanySpainFranceItalyJapanSouth KoreaMexicoPortugal

How's The Health & Fitness Market?

How does it evolve in the Health & Fitness market?

ProtX maintains a 4.11-star rating on iOS with 60 ratings, positioning itself as a niche utility in the Health & Fitness category. The lack of a clear monetization model relative to category leaders signals a focus on user acquisition over revenue generation.

Rank progression

1 active ranking tracked — 30-day window

The rivals identified

Nemeses(1)

Fastic Weight Loss & Fasting icon

HealthVida GmbH & Co. KG.

4.4(420.9K)

Fastic dominates the health-tracking space by combining intermittent fasting with macro-tracking, directly competing for the same fitness-conscious user base as ProtX.

Contenders(4)

Targets the same health-conscious demographic but uses a simplified visual system to categorize food quality.

Smart Calorie AI icon

Wartraf sp. z o.o.

4.0(6)

Directly challenges ProtX by utilizing AI-driven chat and scanning features to automate the calorie and macro logging process.

DASH Diet Plan - Food Tracker icon

Riafy Technologies Pvt. Ltd.

4.2(46)

Targets users with specific medical or dietary requirements, overlapping with ProtX's goal-oriented fitness users.

Differentiators

  • Focuses on a specific, medically-recognized diet plan, attracting users who need structured nutritional guidance.
  • Combines food tracking with meal planning, offering a more holistic experience than ProtX's current feature set.

Competes for the niche health-tracking audience by focusing on specific nutritional intake goals rather than general calorie counting.

Differentiators

  • Provides expert-informed methodology that adds credibility compared to ProtX's generic tracking approach.
  • Includes plant diversity tracking, which encourages specific dietary habits beyond simple calorie and protein counting.

Same space(3)

Healthy Together App icon

Nairobys Montano Gallegos

2.0(21)

Targets the same wellness-focused audience through educational content rather than functional tracking tools.

Shares the health-conscious user base but focuses on natural living and expert consultation rather than data logging.

wHealth Dashboard icon

Jean-Philippe Reynaud

4.6(73)

Aggregates health data, serving as a secondary tool for users who track macros and want to visualize their overall health metrics.

Compare Protein Tracker & Calculator against every rival

All rivals in one side-by-side table — identity, store metrics, ratings & sentiment, and strategic intel — plus a head-to-head page for each.

Go deeper

The outtake for Protein Tracker & Calculator

Strengths to defend, gaps to attack

Core Strengths

  • AI-powered food scanning reduces manual entry friction
  • Apple Health integration ensures data portability

Critical Frictions

  • Zero monetization strategy limits development capital
  • No cloud-save functionality risks user data loss
  • Limited review volume hinders social proof

Growth Levers

  • Implement premium tier for advanced analytics
  • Introduce social challenges to drive retention
  • Partner with fitness influencers for B2B distribution

Market Threats

  • AI-powered barcode scanners automate entry more effectively
  • Established fasting apps capture the same demographic

What are the next best moves?

highInvest

Implement a freemium subscription tier because the current free-only model lacks revenue to fund feature parity → increase lifetime value

The current free-only model limits the developer's ability to fund high-cadence updates required to compete with established apps.

Trade-off: Pause the development of new AI-model training to focus engineering on the subscription gate.

mediumPivot

Ship cloud-save functionality because data loss is a critical churn risk for long-term food loggers → improve retention

Competitors offer persistent data storage, making ProtX's lack of cloud-save a significant competitive disadvantage.

Trade-off: Deprioritize the planned UI refresh for the dashboard to ensure data integrity.

A counter-intuitive read

The lack of monetization is not a weakness but a deliberate acquisition strategy to build a user base before pivoting to a data-driven health platform.

Feature Gaps vs Competitors

  • Advanced analytics and progress visualization (available in Life Fasting Tracker)
  • Structured meal planning (available in DASH Diet Plan)
  • Barcode scanning for automated entry (available in LabelScan Ai)

Key Takeaways

ProtX offers a useful AI-driven logging tool, but the lack of a monetization strategy and cloud-save functionality creates a high churn risk, so the PM should prioritize a freemium transition to fund essential retention features.

Where Is It Heading?

Mixed Signals

The health-tracking market is consolidating around apps that provide holistic meal planning and advanced analytics. ProtX is currently exposed due to its limited feature set and lack of revenue, so the PM must pivot to a sustainable monetization model to avoid being outpaced by AI-native competitors.

The lack of a monetization model limits the development budget, which prevents the app from keeping pace with competitors' feature updates.

AI-powered protein identification remains a high-utility differentiator that addresses the primary friction point of manual food logging for users.

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with editorial review, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Protein Tracker & Calculator, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

What's new

ProtX pivoted from a free-only acquisition strategy to a focus on monetization and data retention to address sustainability risks.

shifted

Freemium Strategy Adoption

removed

Sentiment Data Availability

added

Cloud-Save Vulnerability

shifted

Competitive Landscape Refresh

Cite this report

Marlvel.ai. “Protein Tracker & Calculator Intelligence Report.” Updated May 19, 2026. https://marlvel.ai/apps/protein-tracker-calculator

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