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MediumMobile AppFrontierClear niche and buyerAI model/API accessPayments via RevenueCat
Verified

Open-Source AI Calorie and Fitness Tracker

Open-source calorie, nutrition, fasting, and workout tracker for iOS and Android. Log meals with photos, barcodes, voice, or text. Track macros, weigh…

In plain English

Fud AI is an open-source app for tracking calories, fasting and workouts on iPhone and Android. Users log meals with photos, barcodes, voice or text and can bring their own AI key. Paid plans add hosted AI. TrustMRR shows about $34 a month in recurring revenue. The AI does the logging, while the owner keeps it ad free.

Automation85%
Startup cost~$99
Time to first $Not disclosed
Monthly range*$34 MRR

~$34 MRR; $224 verified revenue last 30 days (TrustMRR/RevenueCat, Oct 29, 2026)

DifficultyMedium
SourceTrustMRR - Fud AI - Calorie Tracker ↗

Operator: Apoorv Darshan

Verified

Revenue independently checked: documents reviewed by a publication, or a public dashboard.

Apple Developer $99/yr; other costs not disclosed.

The tool stack

RevenueCat ↗
Free up to $2.5k MTR

Mobile subscriptions

 OpenAI API ↗
Pay per token

LLM / vision

 App Store ↗
$99/yr

iOS distribution

Prices are the vendors' published list prices as researched in Oct 2026 and change often — always check the vendor's pricing page.

Step-by-step setup

  1. Pick one daily job (capture, transcribe, convert).
  2. AI does the heavy lifting on device or via API.
  3. Subscription after a free trial.
  4. App Store search + organic short-form content.

What's automated vs. the human 15%

The machine does

  • Core AI generation/analysis
  • Billing and onboarding

You still do

  • Product quality and support
  • Distribution and marketing
  • Compliance and edge cases

Overview

Open-source calorie, nutrition, fasting, and workout tracker for iOS and Android. Log meals with photos, barcodes, voice, or text. Track macros, weight, water, and workouts, and get guidance from an AI coach. Choose from 13 AI providers with your own API key, or use optional Plus/Pro hosted AI. Local-first, ad-free, and no account required for core tracking.

Operator: Apoorv Darshan. Category on TrustMRR: Mobile Apps. Founded: 2026-02-11. Website: https://fud-ai.app/

Estimated split: about 85% of the work automated, 15% human.

Realistic income

TrustMRR (checked Oct 29, 2026) shows about $34 MRR and $224 in RevenueCat-verified revenue over the last 30 days, $273 verified over its tracked history. This is one operator’s result, often after months or years of work, and doesn’t predict yours. Check the live listing — numbers change.

Risks

  • Platform fees and review rules.
  • Big apps may add the same feature.
  • Startup cost and time to first dollar are not disclosed.

*Income figures are illustrative ranges based on public pricing and typical outcomes reported by practitioners, not guarantees. Most new online businesses earn little or nothing at first. Not financial, legal or tax advice.

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Featured in: AI Calorie Tracker Apps: 27 Verified, Top Earns ~$46k MRR, Median $185

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