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AI fitness app Photo, barcode, text. You approve every entry.

Take a photo of a plate, scan a barcode, or describe a meal in a sentence. GemFit returns an editable estimate with a source and confidence label, and nothing lands in your log until you save it.

For people who want one iPhone app for food, training, body metrics and plans, with AI that drafts entries and a review step before anything is saved.

Free to download. Optional Pro subscription. iPhone only.

GemFit for iPhone · shown with demo data

In the app

  • Meal photo estimates
  • Barcode and USDA lookup
  • Source and confidence labels
  • Coach drafts on Pro
  • 24 connected AI tools

Most fitness apps are good at storing what you enter and quiet about how the numbers got there. GemFit takes a different position: AI can draft an entry from a photo, a barcode or a sentence, but the estimate is shown to you with its source before it is saved, and you can change any part of it.

That review step runs through the whole app. Meal photos come back as editable estimates. Workout descriptions on Pro come back as drafts. Coach on Pro proposes changes as drafts. Connected AI tools send drafts you approve in the app. The log stays yours.

This guide walks through how logging works, what the AI is responsible for, how goals and progress fit together, and where the estimates stop being reliable.

How AI-assisted logging works

Open the Log tab and pick the way that fits the meal. A photo of the plate returns an estimate of the foods, portions, calories, protein, carbs and fat that you can edit line by line. A barcode looks the product up in Open Food Facts, and supported lookups may use USDA data or official restaurant nutrition. On Pro, a text description such as 'two eggs, toast with butter, black coffee' comes back as an editable draft. You can also search the USDA database or enter a meal by hand, with serving presets for repeat portions.

Workouts follow the same pattern. Log exercises with sets, reps, weight and duration, add them from a searchable exercise library, or on Pro describe the session in text and review the draft. Whatever the starting point, the entry is shown to you before it is saved.

  • Meal photo to an editable calorie and macro estimate
  • Barcode lookup through Open Food Facts, with USDA or official restaurant data where supported
  • Text descriptions for meals and workouts on Pro, returned as drafts
  • USDA search, manual entry and serving presets on every tier

What the AI actually does

GemFit's AI has a short list of jobs. It estimates a meal from a photo. It turns a text description into a draft entry on Pro. Through Coach on Pro it answers questions about your own saved logs and plans, and it drafts a meal, workout, body-metric, supplement, plan or goal change when you ask for one. On Pro it can also enrich a food entry with vitamins, minerals, and allergen and diet flags.

It can also work from outside the app. Connected AI through MCP exposes 24 tools over OAuth, so an assistant you already use can read your logs or propose an entry. Any change it proposes arrives as a draft you approve in the app or on the web Connect page, and a connection can be revoked at any time.

  • Photo estimates and barcode lookups on the free tier
  • Text-to-log drafts, Coach conversations, plan drafts and micronutrient enrichment on Pro
  • Every saved entry carries a label: official source, web-verified, AI estimate, or unresolved
  • Connected AI tools send drafts, never direct writes
Coach on ProA request in plain words becomes review cards. Edit them or approve them; nothing saves on its own.Shown with demo data.

Goals you set, progress you can read

GemFit does not promise a result on a timeline. What it gives you is a log you can trust and a set of targets you choose yourself: calories, macros, steps, water and sleep. The Home tab shows today against those targets, and the Progress tab summarizes workouts, average intake and weight over 1, 3, 7 or 30 days, a custom date, or all time.

Photo logging can help draft a meal entry, but ingredients and portions still need your review. Source labels distinguish published nutrition from estimates. Coach on Pro can summarize your available logs and suggest a next step without treating missing entries as a complete picture of your day.

Honest about confidence

Every estimate in GemFit wears its source on the outside. A barcode match to an official source is labeled as such. A web-verified item, an AI estimate and an unresolved item each get their own label, so a day of packaged foods reads differently from a day of photo estimates.

The labels are there because AI estimates are estimates. A photo cannot show what is under the sauce or how much oil went into the pan. Treat the estimate as a starting point, adjust the portion if you know better, and save it once it matches what you ate.

  • Four labels: official source, web-verified, AI estimate, unresolved
  • Editable foods, portions and macros before saving
  • No entry is saved without your review

Common questions

What AI models does GemFit use?

GemFit routes photo estimates, drafts and Coach through server-side AI providers chosen for each job. Model versions change as quality improves. The source labels, the editable drafts and the review step before saving stay the same.

Can I lose weight with GemFit?

GemFit does not promise weight loss in any timeframe. It gives you targets you set yourself, a log you review entry by entry, and a Progress tab that shows average intake and weight over the period you choose. What you do with that is up to you and, where relevant, your clinician.

Is the AI accurate enough to trust?

It depends on the entry, which is why each one is labeled. Barcode matches to an official source are the most reliable. AI estimates from a photo or a description are starting points that you should check against the portion in front of you. Nothing is saved until you review it.

Does GemFit replace a coach or dietitian?

No. Coach on Pro answers questions about your own saved logs and plans and drafts changes you approve. It does not diagnose, treat or give medical advice.

What is free and what needs Pro?

Free includes manual food and workout logs, barcode lookup, meal-photo analysis and progress reports. Pro adds Coach conversations, text-to-log drafts, AI plan drafts and micronutrient enrichment.

Log one real day, then decide.

Food, training and body measurements in one private log. Coach and drafts are there when you want them, and nothing is saved until you approve it.

Free to download. Optional Pro subscription.

GemFit.aiFood, macro and workout logiPhone · Free download

QR code that opens GemFit.ai on the App Store

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