How SincereNotes Turns Good Intentions Into Messages That Actually Get Sent
An app that remembers the moments that matter for you, then hands you a message worth sending.
The Challenge
Staying close to the people who matter most gets harder as life fills up.
A grief anniversary, a hard week of treatment, a friend who’s gone quiet: these are exactly the moments people mean to show up for, and the ones they’re most likely to let slip. Generic reminder apps and calendar alerts can flag a date, but they carry none of the emotional context around it. They don’t help someone figure out what to say, and they don’t make it easy to actually send something once the reminder fires. Good intentions stall out before they become a message.
The Solution
Flywheel partnered with SincereNotes to build a mobile app that turns a good intention into a one-tap action.
Users add the people in their life along with the moments that matter: birthdays, grief anniversaries, ongoing care, or just a standing “thinking of you.” SincereNotes handles the scheduling and drafts a warm, personal message ahead of time, so the user only has to review it, adjust it if they want, and send. Every message goes out as the user’s own text, not through an in-app inbox or a third-party number. The app stays out of the relationship instead of sitting in the middle of it.
Leveraging AI to create personalized messages
Instead of leaving users to stare at a blank text box, SincereNotes prepares a first draft for every scheduled note, tuned to the occasion: gentle for a grief anniversary, encouraging for a treatment check-in, casual for a monthly check-in. Users edit freely before sending. The app does the hard part of starting the message, without taking it out of the user’s own voice.
A schedule as personal as the relationship
Every person gets their own cadence: weekly, monthly, yearly, or a custom one-off. A note can also be tied to an ongoing season, like a friend’s treatment cycle, so check-ins land throughout instead of just once.
Sent as your own text, not through the app
When a reminder fires, SincereNotes hands the user a ready-to-go message and sends it through their own phone number on tap. No in-app chat, no third-party number in between: the message shows up exactly the way any other text from a friend would.
Designed in the open, screen by screen
Every flow was mapped end to end before a pixel was polished: open the app, speak a thought, watch it write, review, save. Edge cases like an empty day or a long relationship list were drawn and annotated as their own states, so development never had to guess.
Choosing warmth over speed
Two directions were explored. Activity-first led with a widget-style action card for dumping thoughts quickly. Relationship-centric put a large soft-glow orb at the centre, making voice input feel less like a tool and more like a space for reflection. The second won, and set the tone for everything after it.
A visual identity built for the moments that matter
- Coral#FF6F61
- Cream#FFFAF8
- Charcoal#2E2E2E
- Blush#F28C8C
- White#FFFFFF
What we shipped for SincereNotes.
SincereNotes shipped as a full mobile app with AI-assisted message drafting, per-person custom scheduling, and native SMS delivery, built to feel like a personal habit rather than another notification to dismiss.
Flywheel Studio partners with founders building emotionally intelligent products, apps that use AI to support a human moment instead of replacing it. If you’re building something that needs to feel human, our team can help you ship it.
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