Charlie Chang’s apps

Deep Work Defender

Protect and measure focused work time.

Protects and measures the hours that actually produce work. It blocks the time, silences what can be silenced, and reports honestly on how much uninterrupted work happened rather than how much was scheduled.

What a v1 does5 features
  • Blocks scheduled and defended against meeting requests
  • Notifications suppressed for the duration
  • Interruptions counted, with what caused them
  • Real focused hours reported against intended hours
  • Weekly trend, so a bad week is visible as a bad week

The market

Adjacent marketFocus and blocking
3M usersat Freedom, which charges from $3.33 a month

Opal charges $19.99 a month or $99 a year for the same job. Neither publishes revenue, so the prices are the evidence. At $6 a month this sits inside a range the category has already established.

Where these numbers come from
CompanyEarnsReachSource
Freedom$3.33/mo annual · $199 lifetime3M+ users and teamsPublished pricing
Opal$19.99/mo or $99/yrNot publishedPublished pricing, 2026
ForestNot publishedTop-5 most-installed focus appCategory ranking, 2026

Why this audience

This audience believes focused hours are the input that matters - they have been told so repeatedly and agree. What they lack is any honest measurement of how many they actually get. Being shown the real number is uncomfortable and valuable to people who already accept the premise.

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$6

Opens on the price this idea was costed at, $6.

1,000 paying — 0.05% of 2M followers — × $6 a month = $6,000 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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