BulkUp AI vs GainDay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BulkUp AI
This app offers personalized calorie and macro targets for weight gain, loss, or maintenance. It features AI-powered food logging via photo and provides a supportive environment for tracking progress without shame.
- Personalized calorie and macro targets
- AI food logging with photo scan
- Weight gain, loss, and maintenance plans
- Progress tracking without shame
- Streak and badge rewards
- Daily calorie range feedback
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BulkUp AI is a calorie tracker that adapts to your goal, not the other way round. Want to gain weight? Lose it? Hold steady? You get a plan built for your body and your pace, and a home screen that shows exactly where you stand today. WHY BULKUP AI - One plan, any goal: gain, lose or maintain, with calories and macros calculated for your body, activity and the pace you choose. - AI food logging: snap a photo of your meal and we estimate the calories, protein, carbs and fats. No hunting through databases. - Honest numbers: your daily range tells you when you have eaten too little as well as too much. Starving yourself is not a win, and the app will never pretend it is. - No shame: progress is always framed toward your goal. No red warning colors for a missed day, whichever direction you are heading. - Streaks and badges that reward showing up, never punish you for stopping. BUILT FOR PEOPLE WHO STRUGGLE TO EAT ENOUGH Most calorie apps assume you want to eat less. If you are naturally skinny, or coming back from illness or injury, that assumption makes them useless. BulkUp AI sets a surplus you can actually hit and shows you how close you got. HOW IT WORKS 1. Answer a few quick questions: height, weight, age, goal and how fast you want to get there. 2. Get your daily calorie and macro targets, plus a realistic date for reaching your goal. 3. Log meals in 3 taps: snap a photo, search, or add manually. 4. Watch your ring fill, your streak grow, and your weight trend toward your target. WHO IT'S FOR - Anyone who wants to gain weight and struggles to eat enough. - Anyone losing weight who is tired of apps that shame them. - Anyone holding a hard-won result who just wants to stay there. BulkUp AI requires a subscription to use: - Monthly: $4.99/month - Yearly: $17.99/year (best value) Terms of Use (EULA): https://bulkupai.com/terms Privacy Policy: https://bulkupai.com/privacy
GainDay
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GainDay makes gaining weight simple. Tell it your current weight, how much you want to gain, and by when — GainDay estimates how many calories to eat each day, then counts them down as you log your food. Built for hardgainers, athletes, and anyone who struggles to eat enough. YOUR DAILY NUMBER • Personalized calorie target from the widely used Mifflin-St Jeor formula: your maintenance calories plus the exact surplus for your goal • Set your goal in pounds and weeks — GainDay does the math and shows your pace • Meal reminders every 2, 3, or 4 hours between the times you choose — eating often is how you hit a surplus • Under-eating alert: get warned any day you finish below maintenance, before it costs you progress • 7-day calorie average so one bad day never hides the real trend • Protein target sized to your body weight for muscle gain LOG FOOD IN SECONDS • Scan any barcode — instant nutrition for millions of packaged products • Search the USDA food database plus millions of branded foods • Calorie-dense foods are flagged with a flame so you can spot the best gaining picks at a glance • Favorites and Recent sections learn what you actually eat • 36 built-in high-calorie snack and meal ideas, from trail mix to chicken alfredo • Add your own custom foods — saved on your device forever • Forgot to log? Page back up to 7 days and fill in any day WATCH YOURSELF GROW • Log weigh-ins in seconds • Weight trend chart over the week, month, or year • See your actual lb/week pace versus your goal pace, with a heads-up when you're falling behind • Progress bar from your starting weight to your goal SIMPLE, PRIVATE, NO SUBSCRIPTIONS • Every feature included — no premium tier, no locked charts, no upsells • No account, no sign-up, no ads • All your data stays on your device Whether you're bulking for muscle, putting weight back on, or just trying to eat more, GainDay keeps it effortless. Food data from USDA FoodData Central and Open Food Facts. Note: GainDay provides general nutrition information and is not medical advice. Calorie and nutrition values are estimates. Consult a healthcare professional before making significant changes to your diet, especially if you have a history of an eating disorder or other medical condition.
Screenshots
Verdict
The clearest difference is in-app purchases: GainDay at none against BulkUp AI's 2. On price, ads, device support and iOS requirement 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
Both are free to download. BulkUp AI sells 2 in-app purchases, starting at $4.99 per month. GainDay asks for nothing beyond the download.
| Parameter | BulkUp AI | GainDay |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 9 days | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 95 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Naseem Khan | Jaime Bertran |
In-app purchases
BulkUp AI
- BulkUp AI Monthly$4.991 Month
- BulkUp AI Yearly$17.991 Year
GainDay
No in-app purchases








