Charlie Chang’s apps

3 Things Accountability

Track completion, streaks, consistency, and performance.

Adds the part that makes the system stick: a record of what was completed, a streak worth keeping, and optionally a person who sees it. Consistency is measured over weeks rather than days.

What a v1 does5 features
  • Completion tracked daily and rolled up weekly
  • Streaks with an honest view of the misses
  • An optional partner who sees the record
  • Patterns surfaced - which days fail, and why
  • A weekly summary of consistency rather than volume

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 $5 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

This audience knows that consistency, not intensity, is what separates the operators in the content from the viewers. They have streaks in other parts of their life. A visible record and someone who sees it is the mechanism they already believe in.

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$5

Opens on the price this idea was costed at, $5.

1,000 paying — 0.05% of 2M followers — × $5 a month = $5,000 a month

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Revenue a month$0123456789,012345678901234567890123456789
Over twelve months$01234567890123456789,012345678901234567890123456789

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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