Case study · Productivity

Documents, renewals and notes that remind you first.

A personal diary app for notes, checklists, documents and renewal dates, with a calendar, categories and reminders.

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Client: REMIN DIARY
Sector: Productivity
What we built: Diary app for iOS and Android, reminder API and admin.
Platform: Flutter app, Node.js API, Next.js admin.

In short

Remin Diary keeps the things people forget: a document that expires, a renewal date, a checklist. Notes can be descriptive or checklist style, documents are stored with their renewal dates, and the calendar and reminders surface them before the deadline rather than after.

The brief

The value is the reminder, not the note.

Anyone can store a document. The app had to know when it expires and say so in time.

What had to be true

Two kinds of notes
Descriptive notes and checklist notes, categorised.
Documents with dates
Documents stored with renewal dates that the app tracks.
A calendar view
Custom calendar with events, notes and renewals in one place.
Reminders that arrive
Reminders and notifications ahead of each date.

What we did

We modelled dates as the core and notes around them.

Everything with a date feeds one calendar and one reminder engine.

01

Renewal as a first class record

Documents carry a renewal date the API tracks, with a reminder module that fires ahead of it.

The deadline is the data.

02

Notes that fit the task

Descriptive notes for context, checklist notes for doing, both categorised.

Two shapes of note.

03

One calendar

Events, notes and renewals shown together with a custom calendar widget.

One view of time.

The work

REMIN DIARY: Checking today's tasks

REMIN DIARY: Task overview and today's tasks

REMIN DIARY: Events

REMIN DIARY: Overview, tasks and events

What changed

Nothing expires unnoticed.

What the app does on the user's behalf.

Ahead

reminders before renewals and events

2

note types: descriptive and checklist

One

calendar for every dated thing

Technology

What this was built with.

Chosen to fit the problem and the team who owns it now.

01Mobile

Swift
Kotlin
Flutter
React Native

02Data and cloud

PostgreSQL
MySQL
MongoDB
AWS
Azure
Docker

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