Every feature, explained in detail
From barcode scanning to AI nutrition coaching -- here is everything FuelStack does and exactly how it works.
Lightning-fast food logging
The daily tracking loop needs to be fast. We obsess over every tap so logging a meal takes under 30 seconds.
Smart Food Search
1.9M+ foods via FatSecret with fuzzy matching. Recent and frequent foods surface first, prioritised by time of day.
Barcode Scanning
Point, scan, done. Instant nutritional lookup from the barcode database. Manual entry fallback if not found.
Quick Add Methods
Recent foods, frequent foods, favourites, copy from yesterday, or just quick-add raw calories for fast approximate logging.
Real-Time Macro Updates
Adjust serving sizes with a slider and watch protein, carbs, fat, and calories update in real-time before you log.
Favourites & Recents
Pin your go-to foods for one-tap logging. The last 20 logged items are always a tap away.
Copy Previous Day
Ate the same thing yesterday? Copy entire meals or individual items from any previous day with a single tap.
Structured plans with prep reminders
This is the key differentiator -- structured meal plans with scheduling, prep reminders, and one-tap logging from your plan.
Weekly Calendar View
See your entire week of meals at a glance. Day-by-day or weekly template modes. Training day vs rest day calorie switching.
Recipe Builder
Combine ingredients into reusable recipes with auto-calculated per-serving macros. Scale servings up or down.
Prep & Meal Reminders
Get notified 30 minutes before a meal to start prepping. Meal time alerts keep you on schedule. Configurable per slot.
Food Swaps
Tap any food in your plan and get 3-5 alternatives with similar macros. Swap chicken for salmon and see the exact macro difference.
Import From Coach
Coaches can share meal plans as JSON/CSV templates. Import, review, and activate in seconds. No re-typing.
Duplicate & Edit
Love last week's plan? Duplicate it and tweak a few meals. Build your library of go-to plans over time.
AI that actually understands nutrition
Three tiers of intelligence -- from zero-cost smart defaults to full AI-powered coaching -- all grounded in your real data.
AI Meal Plan Generator
Tell the AI your goals, dietary preferences, prep time, cuisine preferences, and budget. Get a complete week-long meal plan with exact portions calibrated to your macros.
Natural Language Logging
Type or say "large flat white and two slices of toast with peanut butter" and the AI parses it into structured food entries matched to the database.
AI Nutrition Coach
Chat with an AI coach that has access to your logs, weight trend, and meal plan. Ask "Why am I not losing weight?" and get a data-backed answer.
Photo-to-Log
Snap a photo of your meal. Spike Nutrition AI identifies every item, estimates portions, and returns a full macro breakdown. Confirm and log in one tap.
Smart Food Swaps
Hybrid system: pre-computed swap tables for the 200 most common foods (instant) plus LLM fallback for uncommon items or complex constraints.
Adaptive TDEE
A statistical model that tracks your intake vs weight change over time, back-calculates your actual energy expenditure, and auto-adjusts your calorie target.
Data-rich, insight-driven
Understand your progress at a glance with charts, trends, and adherence metrics that inform without judging.
Weight Trend Chart
Raw weigh-ins plus an exponential moving average trend line that smooths out daily fluctuations. See the real direction.
Calorie & Macro Trends
Weekly bar charts showing daily averages for calories, protein, carbs, and fat. Spot patterns and adjust.
Adherence Score
Percentage of days where you hit within plus/minus 10% of each macro target. Non-judgmental -- just data.
AI Weekly Review
Every Sunday, get an AI-generated insight: "You averaged 142g protein -- 12g below target. Consider adding a protein shake to your afternoon snack."
Built for real life
Offline support, sub-second performance, POPIA compliance, and a South African food culture understanding.
Offline-First Logging
Log food entries offline. They sync automatically when you reconnect. Your active meal plan and reminders work without internet.
Sub-Second Performance
Under 2 seconds cold start. Under 500ms food search with Redis caching. Under 1.5 seconds barcode scan to result.
POPIA & GDPR Compliant
Your nutrition data is deeply personal. We never sell it. Full data export (CSV), account deletion, and transparent privacy policies.
iOS & Android
Built with Expo React Native for a truly native experience on both platforms. iOS 15+ and Android 10+ supported.
Ready to fuel your goals?
Start tracking for free with the full food database, barcode scanning, and smart defaults. Upgrade for AI power when you are ready.