Mark
Trewren

Delft, Netherlands

Building iOS apps & web. Hyrox to undo the damage.

Mark Trewren racing at Hyrox Berlin, 2025
Hyrox Berlin · 2025

Right now

Three projects I’m currently focusing on.

Early stage. Next up: a 90-day promotional sprint on these three. LocknDial is keeping me honest.

LocknDial running on iPhone

01 — iOS · App Store Live

LocknDial

For indie and solo founders - market what you’ve already built. LocknDial keeps promo promises honest.

Built it because I kept launching things and then building new features. Now I can’t.

Dayline AI home screen on iPhone

02 — iOS · App Store Live

Dayline AI

120 days of your health and life data, distilled into one honest sentence — your Dayline. No charts you’ll never read.

Apple Health is a graveyard of complicated health numbers and charts. Dayline reads the room and tells you what is happening.

WatSupAI homepage — AI supplement stack scoring

03 — Web Live

WatSupAI

Score your supplement stack with AI. Stop paying for hype.

Half the things in your cupboard are doing nothing. WatSupAI will tell you which half.

Also live

Smaller bets, still online.

  • Smart Discount Code

    Verified Hyrox training discount codes. Athlete-checked, refreshed weekly.

    smartdiscountcode.com →
  • Protein Cam

    Snap a meal. Get protein in seconds. No logging marathons.

    proteincam.com →
  • Stellar

    Longevity tracking for people who want data before a sermon. Being rebuilt.

    Join waitlist →