The real problem with bulking
In a cut you see progress in the mirror. In a bulk it is the other way round: gaining too fast feels good at first, the numbers go up, and so do the weights in training. Only after weeks does it show that a large part of it was fat. To avoid that you need two things: an honest look at the rate and a plan for when to adjust.
How Lean is law supports your lean bulk
1. Create a phase. You start a Bulk phase, optionally with an end date or goal weight. You set the rate in percent of your trend weight per week. Percent instead of kilos, because 300 g per week means something different for 60 kg than for 100 kg.
2. Weigh daily, read weekly. You enter your weight or let it come from Apple Health or Health Connect. The app smooths the values into the trend and calculates the weekly rate over the last 14 trend values. On the home screen you see phase, week and status at a glance.
3. Adjust when the trend says so. If the rate is above 0.5 % per week, Lean is law warns you. If it sits below target for two or three weeks, that is your signal to raise calories slightly. With Pro the app works out where your expenditure actually is and how many calories the planned rate needs.
4. Put outliers in context. After a refeed, a trip or starting creatine, the scale jumps. You can log such events as a marker or experiment. Individual outliers can be ignored: they stay visible but don't count toward trend and rate.
What you have at the end of a bulk
A clean history with phase band, your actual gain per week, check-in photos from every week and, with Pro, a balance over 7, 30 and 90 days as well as monthly reports. With that you decide the next phase based on data instead of gut feeling.
What Lean is law is not
Lean is law is not a workout log and not a food tracker with a food database. For training you keep using your training app, and for detailed food tracking a nutrition app whose values Lean is law can read through Apple Health or Health Connect.