Helping people plan realistically & understand their patterns over time

Momentum: The weekly planner designed around energy awareness

Client

Own product

Own product

Sector

Wellness, productivity, calendar, ai

Wellness, productivity, calendar, ai

Role

Designer, product manager, researcher and builder!

Designer, product manager, researcher and builder!

The TLDR

I've just launched my own web app! from concept to shipped product,
with Replit.

A weekly planner built around energy, not output.
Not streaks. Not productivity metrics.

It’s designed for people navigating full, modern lives, whether that’s balancing work, workouts, or social commitments, and trying to understand why things start to slip by the end of the week. Most modern planning tools help you optimise your schedule for productivity. Momentum helps you understand and maintain it, realistically.

Just a clearer picture of:
- what your week looks like (your plan)
- what your days feel like (your energy variability)
- what your week actually felt like (your reflection)
- and what you can learn from it (your insights)

Made it to the top 100 finalists from 6000 builder in the Replit Agent 4 buildathon.

https://momentumplanner.co

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Get in touch

I'm currently available from April 2026, for full-time or Freelance projects in Amsterdam or remote, and open to relocation within the EU or UK.

Billie Gray - 2026

Amsterdam, NL

Get in touch

I'm currently available from April 2026, for full-time or Freelance projects in Amsterdam or remote, and open to relocation within the EU or UK.

Billie Gray - 2026

Amsterdam, NL

Get in touch

I'm currently available from April 2026, for full-time or Freelance projects in Amsterdam or remote, and open to relocation within the EU or UK.

Billie Gray - 2026

Amsterdam, NL