20 Best Apps to Gain Weight Deliberately in 2026

Gaining weight deliberately is harder than it looks — not physiologically, but operationally. The math is simple: eat more calories than you burn, consistently, over weeks and months. The execution is where hardgainers fall apart. A stomach that satiates quickly, a lifestyle that compresses eating windows, a reflex to underestimate how much is on the plate — all of these conspire against the calorie surplus. The apps on this list exist to fix the operational problem, not the motivational one.

We evaluated over 30 apps against a hardgainer-specific rubric: surplus tracking (not just calorie counting), food logging friction at high volumes, progressive overload integration, protein adequacy alerts, meal-timing support, and value at the free tier. The 20 that survived are ranked roughly by utility for the person who has already decided to bulk deliberately and needs a tool that works with them rather than against them.

Pricing reflects publicly available data as of mid-2026. Free tiers are noted where they exist. If an app requires a subscription to do the one thing a hardgainer needs — log a 4,000-calorie day without a paywall stopping them — we say so.

How we ranked: the hardgainer criteria

A weight-loss app retrofitted with a “bulk mode” toggle is not a weight-gain tool. We looked for five specific capabilities.

Surplus visibility. The app should show remaining calories to goal, framed as a surplus to hit rather than a budget not to exceed. This sounds trivial. It isn’t. Most food-logging apps inherited their UX from calorie-restriction contexts, and the default framing — red when you go over your “target” — is actively demoralising for someone trying to hit 3,800 calories by 9 p.m.

High-volume food logging without friction. Logging six meals a day at 600–700 calories each is a real workflow. Barcode scanning, meal duplication, and custom food creation are not optional features — they’re prerequisites.

Protein adequacy, not just totals. Muscle protein synthesis requires not just adequate total daily protein but adequate per-meal leucine doses — roughly 2.5–3 g leucine per meal, which corresponds to around 25–40 g of high-quality protein.¹ Apps that report only daily protein totals miss the distribution signal. See the best protein tracker apps for a detailed breakdown of which apps actually surface this per-meal leucine data.

Progressive overload integration. Calorie surplus without progressive resistance training produces fat, not muscle. The best apps either log workouts natively or integrate with a gym tracker, so training and nutrition are visible in the same weekly view.

Reliability under high-calorie days. Some apps quietly cap or penalise entries above a certain calorie threshold — a 4,500-calorie entry triggers a “are you sure?” warning. We flagged those.

Tier 1: Full-stack tools (nutrition + lifting)

1. CalEye — The only app on this list that starts from a photograph. For hardgainers who eat composite meals — a loaded rice bowl, a stacked sandwich, a post-workout shake alongside a large plate — photo logging collapses five separate database searches into one. CalEye returns grams of protein, carbs, fat, and total calories with source citations to USDA FoodData Central.² The surplus dashboard shows running daily total against your target, framed positively. No paywall on photo logging. Workout integration via Apple Health.

2. MacroFactor — The best algorithmically adaptive calorie target on the market. MacroFactor adjusts your calorie goal each week based on your logged weight trend versus your predicted weight trend, using a proprietary algorithm the founders have published openly.³ For hardgainers who aren’t gaining fast enough — or who are gaining too fast (mostly fat) — this weekly recalibration is the feature. The food database is US-centric but large. Subscription required: around $12/month.

3. Cronometer — Best micronutrient depth. If you’re bulking on a plant-based diet or have specific micronutrient targets (zinc for testosterone, magnesium for sleep and muscle function), Cronometer’s database is the only consumer tool that covers the full micronutrient panel without approximation. Gold tier ($9/month) required for some features; free tier is genuinely functional.

4. Carbon Diet Coach — Layne Norton’s app applies evidence-based periodisation to calories and macros. The bulk protocol adjusts weekly intake based on body weight change data. Best suited to intermediate lifters who understand periodisation concepts; the onboarding quiz is detailed and the output is a structured plan rather than a blank log. Around $14/month.

5. Gains in Bulk (GiB) — A niche app built explicitly for mass-gain phases. The UI defaults to surplus framing. It tracks weekly calorie averages rather than daily counts, which matters for hardgainers who eat unevenly across the week — a 2,800-calorie Monday and a 4,200-calorie Saturday average out to 3,500, which may be perfectly on target. Free with optional premium.

Tier 2: Strong logging tools with partial lifting integration

6. MyFitnessPal Premium — The largest food database in the consumer market. If the food is obscure, a recipe variation, or a specific brand, MyFitnessPal will probably have it. The free tier is now heavily restricted; the features that matter for bulk tracking (calorie goal customisation, macro split adjustment) require Premium at around $20/month. The UX still reflects its weight-loss roots — the app celebrates being under your calorie goal, which is friction for a bulk.

7. Lose It! (Snap It feature) — Despite the name, Lose It! has had customisable surplus goals since 2022. The Snap It photo recognition is faster than average, though less accurate than CalEye on mixed-cuisine plates. Barcode scanning is excellent. Premium around $40/year.

8. FatSecret — Underrated free option. The food diary is competent, the database is crowd-sourced and international, and the portion size inputs are more granular than most. No AI photo logging. No progressive overload features. But for a pure food log with no paywall, FatSecret is among the best.

9. Lifesum — Strong meal planning for structured bulk eaters. The app’s “Gain Weight” goal unlocks a meal plan that schedules five to six eating occasions per day, which helps hardgainers who struggle to eat enough in three. The recipe library is larger than average. Premium required for the bulk plan: around $7/month.

10. MyNetDiary — The cleanest UI on this list. Data entry is fast; the nutrient breakdown is thorough; the surplus tracking is competent. It lacks the algorithmic adaptation of MacroFactor and the photo accuracy of CalEye, but for someone who wants a straightforward log without the clutter, MyNetDiary delivers. Premium around $9/month.

Tier 3: Workout-first tools with nutrition modules

11. Strong — The gold standard for progressive overload logging. Plates, reps, 1RM estimates, volume-per-muscle-group — Strong tracks it all with a clean, no-upsell interface. The nutrition module is thin; Strong is here because the training half of a bulk needs its own dedicated tool, and Strong is the best. Free core, one-time premium unlock around $15.

12. Hevy — Strong’s main competitor. Better social features (share routines with friends), slightly worse UX. Hevy’s calorie targets are now built in as a lightweight module. Free tier is excellent.

13. Whoop — The recovery-oriented wearable platform. Relevant to hardgainers because training stimulus and recovery balance determines whether the surplus goes to muscle or fat. Whoop’s journal feature lets you log perceived recovery and correlate it with training volume. Food logging is not a Whoop strength — pair it with one of the Tier 1 tools. Subscription required; hardware bundled.

14. Fitbod — AI-generated workout programming that adapts to logged fatigue and muscle recovery. Pairs well with a dedicated nutrition app; does not do serious nutrition tracking itself. The progressive overload logic is good for intermediate lifters who want programming suggestions rather than a blank log. Around $13/month.

15. Boostcamp — Free access to evidence-based lifting programs (GZCLP, PHUL, Jeff Nippard’s programs). Tracks progressive overload within each program’s framework. No nutrition tracking. Use it alongside CalEye or MacroFactor. Best for lifters who want a specific programme rather than a self-directed log.

Tier 4: Specialist and context-specific options

16. Ate Food Journal — Photo-based logging with a mindful-eating emphasis. The UX focuses on how you feel after eating, not just macros. Useful for hardgainers who overeat in a way that causes digestive discomfort — logging satiety signals alongside calorie data can identify which meal combinations cause issues. Macro tracking is secondary.

17. Noom (Bulk-Mode Workaround) — Noom is not designed for gaining weight. But its psychology-based accountability features — daily coaching check-ins, habit streaks, group support — work for hardgainers who struggle with consistency rather than knowledge. You would need to override its goal framing manually. Not recommended for anyone who needs macro precision.

18. Rise Nutrition — A dietitian-matching app where you get a registered dietitian who programmes your nutrition remotely. Relevant to hardgainers with specific medical context (ectomorphic physiology, GI issues limiting food volume, post-illness weight restoration). Not an app in the self-service sense — it’s a professional service accessed through an app. Expensive, but appropriate for certain use cases.

19. Nutritionix Track — Good restaurant database, particularly for US fast-food chains. Relevant to hardgainers who rely on high-calorie restaurant meals to hit their surplus — a double Whopper with large fries is an efficient 1,400-calorie meal when stomach volume is the constraint. Nutritionix’s restaurant data is more reliable than MyFitnessPal’s crowdsourced entries.

20. Protein Tracker by Nutrify — Single-purpose: it tracks protein intake and alerts you when you’ve hit your daily target across meals. No other macros. No calorie total. Useful as a secondary companion for hardgainers who have calorie covered but consistently under-eat protein in the middle of the day. Free.

The stack that actually works

No single app covers every hardgainer need perfectly. The practical combination for most people: one photo-based logger for the bulk of meal logging (CalEye or Lose It! Snap It), one progressive overload tracker (Strong or Hevy), and MacroFactor’s algorithmic target adjustment reviewed weekly. If budget is a constraint, CalEye plus Strong plus FatSecret for database backup covers all three functions without a large monthly spend.

The weekly weigh-in is non-negotiable regardless of which apps you use. Body weight measured at the same time under the same conditions — first thing in the morning, after voiding, before eating — gives the feedback signal that determines whether the surplus is producing the intended rate of gain. For a breakdown of calories to eat specifically for muscle gain, including worked surplus calculations by body weight, that companion piece covers the intake side in detail. The target for muscle-maximising gains is typically 0.25–0.5% of body weight per week for natural trainees, which minimises fat accumulation while sustaining hypertrophy.⁴

What no app can fix

A hardgainer who has genuinely high energy expenditure — NEAT (non-exercise activity thermogenesis) that runs high regardless of deliberate exercise, or a physically demanding job — may need to log for two weeks before concluding that their target is set correctly. Apps calculate TDEE from formulas. The formula may be wrong for you specifically. Two weeks of consistent logging plus weekly weigh-ins produces an empirical TDEE estimate that is more accurate than any equation.³

Appetite suppression from high training volume is a real and underappreciated barrier. Heavy compound lifts — squats, deadlifts, rows — suppress appetite acutely in the hours immediately after training. Many hardgainers find it easier to eat the majority of their calories in the pre-training window rather than fighting the post-workout appetite depression. Logging timestamps in your app of choice is the only way to identify whether this pattern applies to you. For hardgainers interested in simultaneously reducing fat alongside the bulk, body recomposition conditions and constraints are worth reviewing before committing to a pure surplus strategy.

References

1. Norton LE, Layman DK. “Leucine Regulates Translation Initiation of Protein Synthesis in Skeletal Muscle after Exercise.” Journal of Nutrition 136, no. 2 (2006): 533S–537S.

2. U.S. Department of Agriculture, Agricultural Research Service. FoodData Central. Accessed 2026. https://fdc.nal.usda.gov/

3. Hall KD, Heymsfield SB, Kemnitz JW, et al. “Energy balance and its components: implications for body weight regulation.” American Journal of Clinical Nutrition 95, no. 4 (2012): 989–994.

4. Helms ER, Aragon AA, Fitschen PJ. “Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation.” Journal of the International Society of Sports Nutrition 11 (2014): 20.

5. Stokes T, Hector AJ, Morton RW, et al. “Recent Perspectives Regarding the Role of Dietary Protein for the Promotion of Muscle Hypertrophy with Resistance Exercise Training.” Nutrients 10, no. 2 (2018): 180.

6. Trexler ET, Smith-Ryan AE, Norton LE. “Metabolic adaptation to weight loss: implications for the athlete.” Journal of the International Society of Sports Nutrition 11 (2014): 7.