Library
Why people quit,
and what the data says.
Almost everyone who downloads a fitness app is gone inside a month, and almost everyone who starts logging food stops. Those are measured facts, not opinions, and the reasons are better documented than the industry lets on. These pages set out what the research actually says, with sources, and are honest about which parts MVIII answers and which parts no app can.
Behaviour
Deciding is the hard part, and decision fatigue is not why
We went looking for evidence that choosing drains you, expecting to find it. It has failed two large replications. What is left is a better explanation, and one uncomfortable finding about schedules.
Retention
96 of every 100 people are gone in 30 days
Fitness apps churn faster than any other consumer subscription category. The top reason people give is not price and not results. It is friction, and it shows up before the first workout.
Food logging
Tracking does not fail because it costs too much
73% of people who quit tracking said it took too long. 12% said it cost too much. Everything about how a food log should be built follows from that one ratio.
Nutrition
When you are eating less, protein matters more
Every diet tool watches a number you have to stay under. The number that decides what your weight loss is actually made of is one you need to stay over. How to hit a protein floor on a small appetite.
Nutrition
Protein on a GLP-1: why the floor matters more
These medications work. The one thing they do not solve for you is that when your appetite shrinks, your protein requirement does not shrink with it.
Training
What to do when you only have fifteen minutes
"No time" is the most common reason a training day gets skipped entirely. A short session is a real session, and the arithmetic of which parts to cut is not complicated.
About these pages
Every figure here is attributed and dated. Where research supports something MVIII does, we say so and mark it out as a product note rather than folding it into the evidence. Where the honest answer is that software cannot help, we say that too. If you find something wrong, tell us at mviii@mviiiwod.com and we will correct it.