Charlie Chang’s apps

Voice-to-Execution

Convert spoken ideas into tasks, events, reminders, and follow-ups.

Say the thing while walking and find it as a task, an event or a reminder afterwards. It works out which one it is, extracts the dates and names, and files it where it belongs.

What a v1 does5 features
  • Capture by voice in one tap, offline included
  • Automatic sorting into task, event, reminder or note
  • Dates, people and places extracted from the speech
  • Filed into the tools already in use
  • A review queue for anything ambiguous

The market

Proven marketTask and daily planning
50M usersat Todoist, of whom roughly 300,000 pay

That is about 0.6% conversion at the most successful independent task manager there is. Motion went from $2M to $50M in under two years charging $19 to $34 a month, and Sunsama charges $16 to $20. At $9 a month this is priced below both.

Where these numbers come from
CompanyEarnsReachSource
Todoist$26.5M a year50M+ users · ~300k paying customersIndependent estimate
Motion$2M to $50M ARR in under two yearsNot publishedIndependent estimate
Sunsama$16–20/moNot publishedPublished pricing, 2026

Why this audience

These viewers have ideas while walking, driving and filming, and lose most of them. They are already voice-noting into an app that does nothing with it. Turning speech into filed tasks is a small step from a habit they have.

Before it can launch

No licence, certification or data agreement stands between this and a launch — app-store review and an ordinary privacy policy aside.

What it earns

Drag me Every figure recalculates as you go.

Paying users1,000

0.05% of 2M followers · capped at 50,000

Price per month$9

Opens on the price this idea was costed at, $9.

1,000 paying — 0.05% of 2M followers — × $9 a month = $9,000 a month

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Fifty thousand paying users is the ceiling every one of these pages is drawn against, not a forecast. It opens at a thousand, the bottom of the range, so the first figures you see are the modest ones. What the cap buys is comparability: the same range on every app, and the percentage of the audience it takes as the number that moves.

Is this the one for your audience?

We fund it, build it, and run it. You bring the audience and take a share of the revenue. Nothing to pay and nothing to build.

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