A calm companion for the life you’re building.
Wake to a gentle plan. Track mood, water, sleep, weight in 10 seconds. Chat with a coach that actually remembers what matters to you.
- 🥗Protein-first breakfast
- 🏃Walk 10 minutes after lunch
- 🌙Phone off by 9:30pm
Hydration
6 / 8
0s
That’s all a daily check-in takes. Mood, energy, water — gone before your tea cools.
How it works
Three small commitments. The rest takes care of itself.
01
Tell us what matters
2 minutes — focus areas, goals, daily rhythm, body metrics, dietary notes.
02
Wake to a plan
Three focus tasks, hydration and mood widgets, a gentle nudge — tailored to you.
03
Log the small stuff
Mood, water, sleep, weight, focus — ten seconds each. Patterns emerge in a week.
What you can track
Eight signals. Ten seconds each.
Tap a number, add a note, done. Patterns emerge in a week.
Mood
1–5 scale
Energy
1–5 scale
Focus
1–5 scale
Sleep
hours
Water
glasses
Weight
kg
Relax
1–5 scale
Ate well
1–5 scale
What you’ll get
Gentle structure for unstructured days.
A morning plan that fits
Three focus tasks tied to the areas you care about, your goals, your rhythm, and your body.
A coach who knows you
Chat about meals, focus, sleep, mood. Grounded in what you've told us. Coaching, not therapy.
Eight quick check-ins
Mood, energy, focus, sleep, water, weight, relax, ate well — ten seconds each.
Achievements and streaks
Earn calm badges. See streaks. Notice when you slip — without guilt.
Weekly insights with charts
KPIs, line + bar charts, and three patterns we noticed across your week.
Your data, encrypted
Customer-managed KMS keys. Export to JSON or delete anytime.
Why PlainTheory
Different from the rest. Quieter, smarter, yours.
| PlainTheory | Paper journal | Generic planner | |
|---|---|---|---|
| Personalized to your goals | — | Templates | |
| Tracks mood, water, sleep, weight | — | Some | |
| AI coach that remembers you | — | — | |
| Weekly review with charts | Manual | Manual | |
| Apple-style achievement badges | — | — | |
| Encrypted + export your data | — | Varies | |
| 10-second check-ins | — | Slow |
From early users
Real days, gently better.
For the first time, I'm not starting the day in chaos. Three things to focus on — that's it. It's changed how I feel by 10am.
Sam
Designer · 32
The water bottle widget is silly and it works. I drink 7 glasses now without thinking. My sleep rating is up by a full point.
Priya
PM · 28
The weekly review is the killer feature. Real patterns I didn't notice — like my focus crashes when I skip breakfast. Small fix.
Marcus
Engineer · 41
Common questions
The honest answers.
Is this therapy or medical advice?+
No. PlainTheory is general life coaching — daily routines, food, focus, sleep, mood patterns. For anything clinical, talk to a qualified professional.
Can I use it for free?+
Yes. Free covers a daily plan, eight check-in types, water + weight tracking, and five chat messages a day. Plus and Premium unlock more.
Does the AI remember me between sessions?+
Yes. Your focus areas, goals, height, weight, activity level, routine, and dietary notes shape every plan and chat reply. Update them in Settings anytime.
Does it follow my dietary needs?+
Yes. Tell it you're vegan, gluten-free, or allergic to something — those rules apply to every plan and chat reply.
Where does my data live?+
Encrypted in DynamoDB in us-east-2 with customer-managed KMS keys. Export to JSON or delete your account anytime from Settings.
How are the badges earned?+
Hexagonal, Apple-style. First check-in, 3-day streak, 7-day streak, 30-day consistency, first complete plan, five complete days, 50 check-ins. More coming.