Channel CAC comparison
put in what you spent and what you got from each channel. this tells you which one is actually cheapest, and what moving the worst channel budget into the best one would buy you.
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The number this is designed to kill
blended CAC. it is the figure most founders quote and the least useful one, because it hides an expensive channel behind a cheap one. a blended $2.50 can be a $1.80 channel doing all the work and a $4 channel quietly wasting a third of your budget.
the per channel figures above are what you should be looking at weekly.
Before you move the money
check that the users are comparable. a channel with a cheap cost per user and terrible retention is not cheap, it is expensive with a delay. if you can, run this using users who were still active after 30 days rather than installs.
that single change turns this from an acquisition tool into a real one, and it frequently reverses which channel wins.
Numbers tell you what. They do not tell you what to do.
bring your real numbers to the breakdown call and leave with a plan for them. free, no pitch deck.
Common questions
Should I just cut the worst channel?
not immediately. check whether it is expensive because it is genuinely worse or because it is under-optimised, and check retention before deciding. a channel with a higher cost and much better retention is often the one to keep.
How often should I run this?
monthly is enough for budget decisions. weekly tends to make you react to noise, especially at small volumes, and reacting to noise is how budgets end up chasing whichever channel got lucky last week.
Other execute tools
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turn CPM, click rate and install rate into real cost per install, and see which step of the funnel is costing you money.
ExecuteAd budget split planner
split one budget across TikTok, Meta and Reddit, forecast installs per channel and see your blended cost per install.
ExecuteCreative testing planner
work out how many creatives your budget can actually test, and whether each one gets enough data to trust the result.
ExecuteA/B test sample size
work out how many users each variant needs before you run the test, and how many days that will take at your traffic.
Bring one real growth problem. Leave with the fix.
the breakdown call is free. no pitch deck, no agency handoff.