Macros

Best Tools to Build Muscle and Track Body Recomposition (2026)

Updated September 16, 2026 · 8 min read

TL;DR

Body recomposition — gaining muscle while keeping fat gain minimal — lives or dies on two things: hitting a protein target every day and staying close to a small, consistent surplus instead of swinging between overeating and undereating. Mochi's edge is removing the friction from the first part, since logging protein from a photo, voice note, or text takes seconds, and its Max plan adjusts your calorie target based on your real adherence and weight trend instead of a formula you set once and forget. MacroFactor deserves real credit here too — it's the more rigorously "scientific" option since it auto-recalculates your targets weekly off your own logged data. Neither one, nor any app on this list, replaces a body-fat scan, progress photos, or a DEXA/BodPod scan if you actually want to measure the composition side of recomposition — that still requires a separate tool.

Recomposition (building muscle with minimal fat gain) depends on consistent protein intake and a small, steady calorie surplus more than any single app feature
Mochi logs protein and calories from a photo, voice note, or text with no manual database search — the main lever for staying consistent day to day
Mochi's Max plan adjusts calorie targets based on a multi-day read of your real adherence and weight trend, rather than a static formula
MacroFactor is the most scientifically rigorous option for recomp specifically, since it recalculates targets weekly from your own logged intake and weight data
No app on this list — mochi included — measures body fat percentage, takes progress photos, or replaces a DEXA/BodPod scan; that's a separate tool if you want to actually measure the recomposition itself
A reasonable starting surplus for building muscle is roughly 200-300 calories above maintenance per day, adjusted based on your actual weight trend over 2-3 weeks

Recomposition is a tracking problem, not just a training problem

"Body recomposition" gets treated like a special program, but it's really just a narrower version of normal tracking: eat slightly above maintenance instead of a large surplus, hit your protein number every day instead of most days, train hard enough to give the extra calories somewhere useful to go, and watch the trend over weeks instead of days. Nothing about that requires a specialized app — but a bad tracking setup makes it much harder to actually pull off, because the margin for error is smaller than a straight bulk.

On a big surplus, sloppy logging doesn't matter much — you're eating enough that muscle-building calories are covered even if your log is off by a few hundred calories. On a recomp-sized surplus, that same sloppiness either erases the surplus entirely (no muscle-building signal) or turns it into a bigger surplus than intended (more fat than you wanted). That's why logging consistency and protein accuracy matter more here than in almost any other goal.

Best tools for muscle-building and recomp tracking

mochi

Text a photo of your plate, a voice note, or a sentence and mochi logs calories and protein without a database search — the thing most likely to actually happen consistently on a busy day. On the Max plan, it also watches your logged adherence and weight trend and adjusts your calorie target when the data says you've drifted off a true small surplus, instead of leaving you on a number you set once at the start.

Best for: People who want a small surplus maintained automatically without babysitting a spreadsheet, and protein logging that doesn't feel like a chore

MacroFactor

Built by coaches with a research background specifically for this kind of goal — it recalculates your calorie and macro targets weekly based on your logged intake versus your actual weight trend, which is the same core idea as adaptive coaching but with more granular manual control over the underlying algorithm. Logging is manual search/entry rather than photo or voice, which is the main tradeoff against something like mochi.

Best for: People who want the most data-driven, self-correcting target-setting and don't mind manual logging to get it

Cronometer

The deepest micronutrient and protein-quality data of any app here — useful if you're optimizing amino acid completeness across multiple protein sources, not just hitting a gram total. Slower to log day to day since it's manual-search based.

Best for: People who want to verify protein quality and micronutrient completeness in detail, not just total grams

MyFitnessPal

The largest food database for finding exact matches on packaged and restaurant food, with barcode scanning. No adaptive target-setting or recomposition-specific features — you're setting and manually adjusting your own surplus.

Best for: People who eat a lot of packaged/branded food and want exact database matches while manually managing their own surplus

What none of these apps actually do

Be clear-eyed about this: none of the apps above — mochi included — measure your body composition. They track calories and macros in, which is the input side of recomposition. They don't scan body fat percentage, don't take or compare progress photos, and don't replace a DEXA scan, BodPod, or even a decent pair of calipers if you want to actually know whether the scale weight you're gaining is muscle or fat.

If serious recomposition tracking matters to you — not just eating well, but actually verifying the composition of what you're gaining — you need a separate measurement tool alongside whichever calorie/macro tracker you pick. A monthly DEXA scan, a consistent progress-photo routine under the same lighting and pose, or even just consistent calipers from the same person tell you something no food-logging app can: what the number on the scale is actually made of. Use the tracker to control the input (calories, protein, consistency) and a real measurement method to check the output.

frequently asked questions

What are the best tools to build muscle?

For the nutrition side, the tools that matter most are a food tracker you'll actually use daily and consistent resistance training data (a lifting log or app). Mochi and MacroFactor both work well for the tracking half — mochi for low-friction daily logging and adaptive calorie adjustments on its Max plan, MacroFactor for more manual, highly granular weekly target recalculation. Neither replaces a training program; you still need progressive overload in the gym for the calories to go toward muscle rather than just fat.

What are the best apps for body recomposition?

Mochi and MacroFactor are the strongest options for the nutrition-tracking side of recomposition, since both aim to keep you near a small, consistent surplus rather than a static number you set once. Cronometer and MyFitnessPal work fine as trackers but don't do any adaptive target-setting — you're managing the surplus yourself. It's worth noting that none of these apps measure body composition directly. If you want to actually verify muscle versus fat gain, that requires a separate method like DEXA scanning, consistent progress photos, or skinfold calipers alongside whatever tracker you use for food.

What are the best high-protein meal tracking apps?

Mochi is built to make hitting a daily protein number as low-friction as possible — it estimates protein from a photo, voice note, or plain text description and tracks a running total against your target through the day. Cronometer offers the most detailed protein-source and amino-acid breakdown if you want to verify protein quality, not just quantity. MacroFactor sits in between, with per-ingredient protein tracking and target recalculation, at the cost of manual logging.

How many calories should I eat to gain muscle?

There's no single correct number, but a reasonable, well-supported starting point is a surplus of roughly 200-300 calories per day above your maintenance level. That's enough to support muscle growth for most people without adding fat as fast as a large, old-school bulking surplus would. Treat it as a starting point, not a fixed target: track your weight trend over 2-3 weeks, and if you're not seeing a slow, steady gain (roughly 0.25-0.5% of bodyweight per week is a common range for non-beginners), adjust the surplus up or down based on what your own data shows rather than sticking to a number that isn't working.

How do I gain muscle without gaining a lot of fat?

Three things matter more than any app feature: keep the surplus small and consistent rather than large or erratic, hit an adequate protein target every day (commonly cited in the range of 0.7-1g per pound of bodyweight for people training seriously), and make sure resistance training is actually progressing — more weight, more reps, or more volume over time — so the extra calories have somewhere productive to go. Calories alone don't build muscle; a surplus without training stimulus just adds fat. Tracking consistently is what lets you tell, over a few weeks, whether the combination is actually working before you've drifted too far in either direction.

try mochi — text your meals instead of logging them

text mochi