Winnow AI Consulting

Case studies　／　Paper to digital

Service depthLayer 1 ｜ Task automation

One giant A3 chart, turned into a multilingual app

A women's cycle observation record system for a non-profit — delivered, and in real-world use.

The problem

This established method for observing the body's natural signs had long relied on a single A3 chart and a set of stickers. That format created three practical limitations:

  • Paper has limited fields, so it's hard to keep enough detail.
  • Out and about, or with hands full, placing stickers in the moment is difficult.
  • The materials and interface were available only in Chinese, making it difficult for international users to participate.

From understanding to impact

  1. 01 Understand The A3 chart limited the record, and the people using it

    Cramped fields, hard portability, and a language barrier kept important observations from being fully recorded.

  2. 02 Solve Keep the professional method, redesign the recording interface

    A multilingual mobile app now carries the daily observations, supporting notes, and the six-month report.

  3. 03 Impact More complete records, kept on the user's own device

    Recording keeps going, and professionals get the timeline they need to support a judgment.

What we did

We turned the A3 chart and its teaching materials into a mobile app. The system keeps the professional framework of the mucus observation method (the Billings method), and lets users keep their personal records in a language they know.

  • A multilingual interface and materials lower the language barrier.
  • It supports several entries within a single day, with room to add context like mood, diet, medication, and photos.
  • A six-month report can be exported for a doctor to review; when a particular date raises questions, the full record for that day can be traced back.
The cycle calendar screen, where each day's observation is marked in a different color
The cycle calendar: one cell per day, color-coded at a glance. Sample data; all content is fictitious.
The natural cycle observation app showing the full cycle calendar, statistics, and sticker guide
The full interface: the calendar, cycle statistics, the sticker guide, and the entry point for each day's record, all held within a single phone workflow. Sample data; all content is fictitious.

Privacy built into the architecture, not just promised

Because the data is deeply personal, the system was designed from the ground up to stay only on the user's own phone, never uploaded to the cloud. Privacy here isn't a "promise not to look" — it's making the information technically impossible for the service provider to obtain.

The results

The system has been delivered and is in real-world use. Users from abroad who were once held back by language can now record in a language they know; those who used to rely on memory to describe their situation can now provide a fuller six-month report with a clear timeline.

Transferable consulting insights

The three principles this case proved apply just as well to business processes:

  • Every company has its own "A3 chart" — awkward to use, yet carrying information the work cannot do without.
  • Multilingual access is an operating requirement, not just a translation task — training and SOPs are far easier to adopt when they're presented in a language the user actually knows.
  • The purpose of a digital record is better professional judgment — the value of a record lies in getting the right information into the hands of the person who has to decide.
The goal of going digital is not another screen. It is getting the right information to the right decision-maker at the right moment.

Which of your chartsmost keeps information from being fully captured and put to use?

Starting with the paper record that's high-frequency, tedious, and shapes the decisions that follow is often the most valuable place to begin going digital.

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