Lose the weight with a little buddy who's always in your corner.
Hatch your own cheetah cub, give it a name, and keep it glowing with small daily wins.
Thinner turns the hard, lonely parts of weight loss into something you actually look forward to. Every small honest win — a glass of water, a short walk, a real check-in — keeps your companion happy and sends it off on little adventures.
Small honest wins. A buddy that grows with you.
The whole loop fits into a few taps a day — no calorie-counting, no heroics.
Finish today's tiny wins
Steps, a glass of water, a short walk, one better meal choice. Start almost too easy — that's the point.
Do an honest check-in
On track, Mostly, or Not quite — every answer still counts and keeps your momentum moving.
Fill your buddy's energy
Your wins charge your companion up. Once it's full, it's ready for a little adventure.
It comes home with a find
Your cub returns with a collectible to keep and Charms to decorate its cozy room.
Your little coach for every pound.
It starts with an egg. Tap to hatch a cheetah cub, give it a name you love, and choose how it cheers you on.
- ✓Hatch & name it. From day one it's yours — a warm, soft presence that grows as you do.
- ✓Pick its pronoun & personality so it sounds like your kind of coach.
- ✓Honest, kind reactions. “Good enough still counts” on the harder days — never judgy.
- ✓Pet it, give it a pep talk, or tidy its space to keep it cozy and cared for.
Five cozy tabs, one little world.
Everything lives a tap away — your buddy, your quests, your room, your numbers, and your plan.
Home
Your companion and today's wins
Quests
Daily & weekly habit goals
Style
Decorate the room & cub
Lab
Your progress, narrated
Plan
What to focus on next
Charge it up and send it exploring.
Finish enough tiny wins and your cub heads out to one of five hand-painted places — then trots home with a keepsake.
A keepsake from every journey.
27 collectibles to gather across five cozy sets — a gentle, no-pressure reason to keep showing up.
Tiny, doable quests that grow with you.
Nine habit categories, six levels each. You start at baby steps — like 250 steps or a single glass of water — and only level up once it sticks.
Steps
250 → 10,000, at your pace
Hydration
From one cup to a full day
Cardio
Get the heart going, gently
Strength
Build a little, week by week
Nutrition
Simple, balanced choices
Sleep
Wind down, rest, recover
Mindfulness
A few breaths to a calm mind
Accountability
Honest weigh-ins & check-ins
Steps · Hydration · Cardio · Strength · Nutrition · Sleep · Mindfulness · Exercise · Accountability — nine categories in all, each with six gentle levels.
A plan that protects the moments that usually break.
Your Plan turns your goals into a handful of focus areas — daily guardrails, not a giant to-do list. In the Lab, your cub walks you through what's actually happening, in its own gentle voice.
Weight
A smoothed weekly trend, not the daily noise.
Wins
The honest wins that add up over time.
Streak
How many days you've kept the thread going.
Areas
The few things that need a little love next.
Momentum you can actually feel.
Build a streak, level up your companion, and watch a trend line that keeps you honest. One off day won't erase your progress — there's a little grace built in.
Starter
Consistent
Locked In
Unstoppable
Bronze
Silver
Gold
PlatinumToday's honest check-in
Three simple answers. Every one of them keeps you moving.
Share the wins that feel good to share.
Hit a streak, level up, meet your buddy, or come home from an adventure — each moment becomes a soft, ready-made card. Celebration, never a brag about a number.
Cute on the outside. Real basics underneath.
No fads, no miracle claims. Thinner's quests are built on well-established health basics — turned into small daily guardrails instead of a giant to-do list.
Small swaps, big effect
Cutting back on sugary drinks is one of the simplest, best-supported levers there is — so Thinner makes it a gentle daily nudge.
Move most days
Steps, a little cardio and some strength beat the occasional heroic workout. Quests start tiny so movement actually happens.
What gets noticed, sticks
An honest daily check-in and a smoothed weekly trend keep you aware without obsessing over a single number.
Sleep and mindfulness quests round it out — because rest and a calm head are part of the work too.
The self-care pet idea — built for weight loss.
It's easier to show up for a little creature that's counting on you than to show up for a chart.
Most weight-loss apps feel like homework.
- ✗ Count every calorie, log every meal
- ✗ Red warnings and guilt when you slip
- ✗ Big goals that collapse by week two
- ✗ You're doing it completely alone
It feels like caring for a friend.
- ✓ Tiny wins, not giant plans — start at one glass of water
- ✓ "Not quite" still counts — kindness, never shame
- ✓ A cub that needs you — showing up for it is showing up for you
- ✓ Adventures, collectibles & a cozy room make consistency fun
If you've loved self-care pet apps like Finch, this is that idea — pointed at one goal: losing weight, kindly. No calorie or macro logging, ever.
One subscription. Your whole companion world.
Thinner is a paid subscription — choose weekly or yearly. The yearly plan is the best value, and you can cancel anytime.
Subscription required to use the app. Current prices are shown in the App Store before you subscribe and may vary by region. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel anytime in your iPhone Settings.
Your buddy is waiting inside the egg.
Hatch your cheetah cub, give it a name, and take the first small win today.