We tested every major app to find which ones actually help you eat in a consistent surplus, hit protein targets, and build muscle without guessing.
Cutting is forgiving. If you miss 200 calories, you just lose weight slightly faster. Bulking is less forgiving in the opposite direction — under-eat by a few hundred calories for weeks on end and you stall. Over-eat by 500+ calories consistently and you add more fat than muscle.
The goal in a lean bulk is a controlled surplus: typically 200–350 kcal above your TDEE. Too small and you plateau. Too large and you're doing a dirty bulk. Tracking this precisely requires an app that:
Studies show people underestimate calorie intake by 12–38% on average. For bulking, this is fatal — you think you're in a 300 kcal surplus but you're actually at maintenance or slightly below. Precise tracking during a bulk matters more than most lifters realise.
Before choosing an app, understand what numbers you actually need to hit:
| Bulk Type | Surplus Target | Expected Gain/Month | Fat to Muscle Ratio |
|---|---|---|---|
| Lean bulk | +200–350 kcal/day | 0.5–1 kg (~1–2 lb) | ~50/50 |
| Moderate surplus | +350–500 kcal/day | 1–1.5 kg (~2–3 lb) | ~40/60 (more fat) |
| Dirty bulk | +500+ kcal/day | 1.5–3 kg (~3–6 lb) | Mostly fat past year 1 |
Beginner lifters (first year): 1–1.5 kg of muscle per month possible. Intermediate (1–3 years): 0.5–1 kg/month. Advanced (3+ years): 0.25–0.5 kg/month. A large surplus above these rates just adds fat. Tracking your actual intake is the only way to stay in the sweet spot.
NutriBalance hits every box for bulking: the free tier tracks full macros in grams, protein is displayed front-and-centre on the dashboard, the home screen widget shows remaining calories and protein at a glance (crucial when you're trying to hit a high surplus), and the barcode scanner covers 7M+ foods including calorie-dense items like nut butters, protein powders, and mass gainers. Setting a calorie surplus goal is simple — you just enter your target calories above your TDEE. The gamification streak system actually helps with the consistency problem that kills most bulking attempts after a few weeks.
MacroFactor is purpose-built for people who care about body composition. Its standout feature for bulking is the adaptive TDEE algorithm — it adjusts your calorie target each week based on your actual weight trend, accounting for metabolic adaptation. This means if you're gaining weight too fast, it reduces your surplus automatically. If you're not gaining, it increases your target. This is extremely valuable for a lean bulk where precision matters.
Cronometer's strength for bulking is micronutrient depth — it tracks amino acid profiles including leucine, which is the key amino acid that triggers muscle protein synthesis. If you're tracking whether you're hitting optimal leucine doses (typically 2–3g per meal to maximise MPS), Cronometer is the only free app that shows this. The free tier also displays full macros including protein in grams.
MFP's database of 14M+ foods is its main advantage for bulking — you'll find almost every mass gainer, protein powder, and specialty food. However, in 2024 MFP moved macros behind its $19.99/month Premium paywall. Without a subscription, you can see calories but not grams of protein, carbs, or fat. For bulking, tracking calories alone without protein in grams defeats most of the purpose.
Despite the name, Lose It! can be configured for gaining weight. The calorie goal can be set to any target including a surplus. The free tier is limited to calorie tracking with basic macro breakdowns, but the Snap It feature (photo logging) is genuinely useful for quick logging. Like MFP, full macro detail requires a premium subscription.
| Feature | NutriBalance | MacroFactor | Cronometer | MFP | Lose It! |
|---|---|---|---|---|---|
| Calorie surplus goal | ✓ Free | ✓ (Adaptive) | ✓ Free | ✓ Free | ✓ Free |
| Protein in grams (free) | ✓ | ✗ Paid | ✓ | ✗ Paid | ~ Limited |
| Home screen widget | ✓ Free | ~ iOS only | ✗ Paid | ~ Paid | ✗ |
| Barcode scanner | ✓ Free | ✓ | ✓ Free | ✓ Free | ✓ Free |
| Food database size | 7M+ (OFN) | Large | NCCDB quality | 14M+ (mixed) | Medium |
| Amino acid / leucine tracking | ✗ | ✗ | ✓ Free | ✗ | ✗ |
| Adaptive TDEE | ✗ | ✓ | ✗ | ✗ | ✗ |
| Streak / consistency tools | ✓ Free | ✗ | ✗ | ✗ | ✗ |
| Cost (full features) | Free | ~$14.99/mo | Free core | ~$19.99/mo | ~$9.99/mo |
Protein is the non-negotiable for muscle growth. The research consensus in 2026 is clear:
| Experience Level | Protein Target | For 80 kg Person | For 100 kg Person |
|---|---|---|---|
| Beginner (0–1 year) | 1.6 g/kg/day | 128 g/day | 160 g/day |
| Intermediate (1–3 years) | 1.8–2.0 g/kg/day | 144–160 g/day | 180–200 g/day |
| Advanced (3+ years) | 2.0–2.4 g/kg/day | 160–192 g/day | 200–240 g/day |
| During a cut (muscle preservation) | 2.2–2.4 g/kg/day | 176–192 g/day | 220–240 g/day |
Research shows 2–3 g leucine per meal is needed to maximally stimulate muscle protein synthesis (MPS). Below that threshold you get a blunted anabolic response regardless of total daily protein. This equates to roughly 25–40 g protein per meal from high-quality sources (meat, dairy, eggs, whey). Cronometer is the only free app that shows leucine content.
Hitting a 3,000–4,000 kcal target on whole foods alone is hard. These foods add calories efficiently without requiring massive meal volumes:
| Food | Calories | Protein | Why It Works for Bulking |
|---|---|---|---|
| Peanut butter (2 tbsp / 32g) | 190 kcal | 8g | High calorie density, easy to add to shakes |
| Whole milk (250ml) | 150 kcal | 8g | GOMAD-adjacent; adds easily to daily intake |
| Olive oil (1 tbsp / 14g) | 119 kcal | 0g | Calorie-dense with no volume; add to any meal |
| Avocado (½, 100g) | 160 kcal | 2g | Healthy fats, goes with everything |
| Almonds (30g / handful) | 173 kcal | 6g | Portable, no preparation needed |
| Oats (dry, 100g) | 389 kcal | 17g | Cheap, filling, bulk-cooking friendly |
| Banana (large, 136g) | 121 kcal | 1.5g | Fast carbs, pairs well with protein shakes |
| Whey protein (1 scoop / 30g) | 120 kcal | 24g | Best protein/calorie ratio; fast post-workout |
| Salmon (150g fillet) | 298 kcal | 40g | High protein + omega-3 for inflammation recovery |
| Rice (cooked, 200g) | 260 kcal | 5g | Easy base carb, scales up well |
Struggling to hit your surplus? Liquid calories are easier to consume than solid food and don't trigger satiety as strongly. A homemade mass gainer shake — 300ml whole milk + 2 tbsp peanut butter + 1 banana + 1 scoop whey — delivers ~700–800 kcal and 45g protein in under 2 minutes. Log each ingredient separately in NutriBalance for the most accurate count.
A tablespoon of peanut butter "scooped generously" is often 40–50g instead of 32g — a 40%+ error. For calorie-dense foods, always weigh. A kitchen scale pays for itself in muscle gain within weeks.
You add 2 tbsp of olive oil to a pan and assume it all stays in the pan. It doesn't — most of it ends up on your chicken. A meal cooked in olive oil has 120–240 kcal more than the raw ingredients suggest. Log the oil.
Many lifters eat well Monday–Friday then have a social weekend and eat far more — or drink alcohol (7 kcal/g) that they don't log. Weekly average calorie intake often looks nothing like the weekday estimate. NutriBalance's weekly history helps you spot this drift.
As you gain weight and muscle, your TDEE increases. A 3,200 kcal intake that produced a 250 kcal surplus at 80 kg will be maintenance-or-less at 90 kg. Recalculate your TDEE every 4–6 weeks and bump your intake accordingly — or use MacroFactor's adaptive algorithm to do it automatically.
100g of raw chicken becomes ~65g cooked (it loses water). 100g of dry rice becomes ~250g cooked. Always be consistent — either always log raw or always log cooked, and make sure the database entry matches. Most entries say "raw" or "cooked" in the name.
Protein powder is real food with real calories. 1 scoop of whey is typically 110–130 kcal. If you're having 2–3 shakes a day, that's 220–390 kcal untracked. Log every shake.
For most lifters, NutriBalance is the best free calorie tracker for bulking — full macro tracking, home screen widget for quick protein checks, and a streak system that builds the daily logging habit. If budget allows and you want adaptive TDEE that recalculates your surplus based on your actual weight trend, add MacroFactor. Use Cronometer occasionally to audit your leucine intake per meal.
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