Brian Jung’s apps

Trading Journal

Track and analyze trades, strategies, entries and exits, risk and reward, mistakes, and performance.

The record serious traders keep and casual traders do not: why the trade was taken, what the plan was, and what actually happened. Over a few hundred entries it shows which setups make money and which are a habit.

What a v1 does5 features
  • Trades imported from the broker, with the thesis added by hand
  • Entry, exit, size and stop recorded against the plan
  • Performance grouped by setup, instrument and time of day
  • Mistakes tagged and counted
  • A weekly review that surfaces the pattern being repeated

The market

Adjacent marketTrading journals
$30 to $80a month, charged by TraderSync and Tradervue

Neither publishes revenue, but both have sustained those prices for years against active traders. At $14 a month this is priced well under the category.

Where these numbers come from
CompanyEarnsReachSource
TraderSync$29.95–79.95/moNot publishedPublished pricing, 2026
Tradervue$29.95–49.95/moNot publishedPublished pricing, 2026
EdgewonkOne-time licenceNot publishedPublished pricing

Why this audience

These viewers take trading seriously enough to want to be better at it rather than just lucky. That is the precise population who will keep a journal, which almost nobody else will. The discipline is already there; the tool is what is missing.

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

0.045% of 2.2M followers · capped at 50,000

Price per month$14

Opens on the price this idea was costed at, $14.

1,000 paying — 0.045% of 2.2M followers — × $14 a month = $14,000 a month

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

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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