UE by Uri EinavUA operator · built the Bright Storm DSP

Which channel is quietly losing you money?

CPI creeps up, retention plateaus, and nobody flags the channel that stopped paying back - this scores each one on CAC vs. LTV and tells you to scale, hold, or pause.

▸ Run the audit

Your channels: name, CAC, D1%, D7%, D30%

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Fill in the details below and click Run to get your results instantly.

Your channels: name, CAC, D1%, D7%, D30% *

One channel per line, comma-separated. ARPU/month is optional.

Secure & private Results in ~30s

Runnable inputs are not built yet — the real form and run button will appear here when the build lane finishes.

Target payback window - sharpens the pause/scale call Optional

Free · 60 sec · No signup

Last run — — runs — rated useful

A Runnable by Uri Einav,
UA operator · 5 gaming app launches

Channel Profitability Audit · 3 channels scoredRunnable.ai

1/3

Losing money

Google is loss-making at current retention - pause and test a lower CAC.

Meta $0.85 CAC$1.30 LTV

Google $1.20 CAC$1.15 LTV

Rewarded $0.60 CAC$0.90 LTV

Do this first

Pause Google spend now. It's losing money at today's retention - fix the CAC before you put another dollar behind it.

A Runnable by Uri EinavRunnable.ai

The workflow

What it actually does.

Turns your channel-level CAC and retention numbers into a scale/hold/pause call for each one, in under a minute.

PROGRESS0 / 3

Parse channel inputs

Reads each channel line and pulls out CAC and retention numbers.

Model LTV and payback per channel

Fits a retention decay curve per channel and computes lifetime value, payback period, and ROAS.

Write the operator verdict

Turns the computed numbers into a blunt, operator-style scorecard verdict and action plan.

▸ Featured essayThe idea behind this Runnable · 2 min read

The channel isn't broken. Your retention math is just late.

“Judgment is scarcer than production - anyone can pull a CPI report, few will act on what it actually means.”

I've sat in enough weekly UA reviews to know the pattern: someone flags a channel because CPI jumped 20%, and the room panics. But CPI moving is not the same as a channel losing money. I've watched founders kill a channel that was still profitable and keep funding one that never was, because nobody put CAC next to LTV and did the arithmetic out loud.

Running acquisition across five gaming launches taught me the same lesson every time: retention is the number that tells you whether a channel pays back, and it's the number teams check last, if at all. Meta at $0.85 CAC with strong D30 retention can be your best channel even as CPI creeps up. Google at $1.20 CAC with soft retention can be bleeding you dry even when the CPI looks "fine" next to industry benchmarks.

This audit does the arithmetic I'd do in that meeting - CAC against LTV, per channel, with a payback window attached to a verdict, not a vibe.

Run complete

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The evidence Show details

Built by someone who ran acquisition on 5 gaming app launches and built a bid-strategy DSP to fix exactly this problem - CPI that looks fine while the channel quietly stops paying back.

The scoring model

Three questions every UA operator should be asking per channel.

Payback window

How many months until this channel's LTV covers its CAC? A channel that pays back in 8 months and one that never pays back can have the same CPI - this is the number that tells them apart.

Retention trend

Is retention holding, or is early engagement masking a drop-off later? A channel with strong Day-1 numbers and weak long-term ROAS needs a different call than one that's steady throughout.

Scale, hold, or pause

Not a score - an instruction. Double down where the math works, hold where it's borderline, pause and re-test where CAC has outrun what retention can support.

You already suspect which channel it is. Confirm it in 60 seconds.

Free · 60 sec · No signup ·

▸ Questions

Before you run it

Is this just a CPI comparison?

No. CPI alone tells you what you paid, not whether it paid off. This weighs your cost-per-install against retention-implied LTV per channel, which is the number that actually decides whether a channel is worth funding.

What happens to my numbers after I run it?

Your CAC and retention figures are used to generate your scorecard for that session only - they aren't stored, sold, or shared. You're not creating an account to run this.

Who is this for - and who isn't it for?

Built for mobile app founders and growth leads who already track CAC and retention by channel and need the payback math done properly. If you don't yet have channel-level retention data, get that first - the audit is only as sharp as the numbers you feed it.

Is it free? Is there a signup?

Free, no signup, takes about 60 seconds. Enter your numbers and get the scorecard immediately.

What if every channel comes back bad?

That's a real, common outcome when CPI has been climbing faster than retention. The audit will tell you which channel is closest to profitable so you know where to fix CAC first, rather than pausing everything at once.

Does this replace working with Uri directly?

No - this is a sample of the judgment call Uri makes in mentoring sessions, not a substitute for it. It's a fast, honest first read; the deeper diagnostic (channel mix, creative testing, bid strategy) is what the 1:1 work covers.

▸ About the creator

Uri Einav

UA operator · mentor to mobile app founders

Uri ran user acquisition at gaming studios across 5 app launches and built Bright Storm, a DSP for cost-optimized bid strategy, later acquired. He now mentors founders and agencies on unit economics through GrowthMentor, where he holds a 4.98 rating across 77 reviews.

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