roth & hollyAPP STUDIOStart a project ↗
SMALL STUDIO. COMPLETE PICTURE.

Your next app.
Already taking
shape.

Start with a considered design. Make it yours.
Build something people want to use.

Explore the shop Have an idea? Let’s talk
01—03Design. Development. Ongoing care.
IN THE STUDIO
9:41••• ▰
ttraineros
JD

YOUR PROGRESS

Consistency
looks good.

Workouts

4 weeks
12This month
+3vs. last month

Small wins. Real progress.

↗
Dumbbell pressNew personal best · 22 kg
9:41••• ▰
ttraineros
JD

WEDNESDAY, OCTOBER 7

Good morning,
Jordan.

A little stronger. Every day.

MTW7T8F9S10S11
YOUR NEXT WORKOUT

Upper body
strength

45 min · 6 exercises
Start workout →

This week

View all
3/4Workouts
135Active minutes
TrainerOSFitness & coaching ↗
Designed around real journeysEditable from the ground upA clear path to development

HOW WE HELP

A good beginning.
And everything after.

Choose a starting point that fits.
We’ll help with the next step.

01

Find your foundation.

Explore app designs with considered flows, reusable components, and a clear visual direction.

Explore designs
02

Make it your own.

Bring your brand into an existing design, or work with us on a product shaped around your idea.

Start a conversation
03

Keep moving forward.

Plan development and ongoing support with a defined scope, a clear estimate, and a manageable update queue.

Explore app care
9:41••• ▰
ttraineros
JD

WORKOUT IN PROGRESS

Make this
set count.

01 / 06

Dumbbell press

3 sets · 8–12 reps · 90s rest

SETKGREPSDONE
12010
22010
32010
Log set
9:41••• ▰
ttraineros
JD

YOUR PROGRESS

Consistency
looks good.

Workouts

4 weeks
12This month
+3vs. last month

Small wins. Real progress.

↗
Dumbbell pressNew personal best · 22 kg

FIRST IN THE COLLECTION / PREVIEW

Meet TrainerOS.
Less friction.
More progress.

A clean fitness and coaching experience, from the first workout to the next personal best. See how the concept could look as a fitness business, then explore more directions in the collection.

  • Workout logging and progress
  • Coach and client experiences
  • A focused, adaptable design system
Explore the showcase Design in development. Not available for purchase yet.

NO MYSTERY IN THE MIDDLE

From “what if”
to what’s next.

  1. 01

    Get the idea clear.

    Who it’s for, what it needs to do, and what a useful first version looks like.

  2. 02

    Design the right experience.

    Shape the flows, refine the details, and agree on the design before development.

  3. 03

    Build with a clear scope.

    Choose development and care when you need them, with deliverables and estimates agreed first.

YOUR IDEA DESERVES A GOOD START

Let’s give it shape.

Tell us what you’re thinking