Building useful apps for human beings.

The painful moment

It's Sunday morning, dose day. You can't remember if you did left-belly or right-thigh last week, and the last spot is still bruised. Today most users track it in Notes, a paper journal, or a group chat screenshot.

Hair-on-fire user

A 34-year-old semaglutide user 6 weeks in, anxious about lipohypertrophy after reading a scary r/Semaglutide thread.

Wedge MVP

• ◆Camera overlay marking your last 8 injection sites on a body map
• ◆Rotation reminder with cool-down timer per site
• ◆Photo log to catch bruising, lumps, or redness early
• ◆Weekly dose + side-effect summary you can screenshot for your doctor

Money

$6.99/mo or $49/yr subscription. GLP-1 users already spend $200-1000/mo on the compound; $7 for peace of mind is trivial. 2,000 subs at $6.99 = $14K MRR.

Distribution wedge

ASO on 'semaglutide tracker', 'injection site rotation', 'GLP-1 log'; organic posts in r/Semaglutide, r/tirzepatidecompound, and TikTok GLP-1 creators for rev-share.

Competition & gap

MyFitnessPal (no injection tracking), generic med trackers like Medisafe (no body map, no peptide vocab), spreadsheets. Attack: purpose-built vocabulary and body map they can't replicate without alienating their base.

Moat seed

Longitudinal per-user injection + side-effect data becomes a switching-cost moat within 3 months and, aggregated, is publishable research.

Risks & kill criteria

1) Apple review classifying it as medical device — mitigate with 'tracking only' copy. 2) GLP-1 market cooling. Kill signal: <3% trial→paid after 500 installs.