For mobile apps.
Installs, retention and LTV in one cohort model.
Paid and organic installs, subscriptions, ads and in-app purchases, modelled by cohort so you can see when each cohort pays back its install cost.
$30k a month on paid installs at $1.80 CPI, 4% subscribe at $6.99 a month
Day-30 retention is the lever, not more paid installs.
- D1 retentionUsers opening the app the day after install.64%Last 3 cohorts
- D30 retentionDrives most of lifetime value in this model.18%-2ptvs last plan
- Blended ARPUSubscriptions, ads and in-app purchases per user.$2.40Per user
- Paid installs40% of installs are paid, 60% organic.16.7kPer month
Startup Suite is an AI planning workspace that helps app founders model installs, monetisation, retention, and LTV vs CAC.
This page is for mobile app, gaming, and media founders modelling installs, retention, and LTV.
- Subscriptions, ads & IAP
- Revenue per user (ARPDAU)
- Retention curves (D1/D7/D30)
- Paid user acquisition (CPI)
- Platform & infrastructure
- Content & live-ops
- Retention-cohort model
- LTV/CAC model
- App-economics pitch pack
- Forecast Engine
- Scenario Workbench
- AI mentors
Where app growth stops paying back
Paid installs burn cash fast
User-acquisition spend scales quickly, and it's easy to outrun what it pays back.
Most users are gone by day 30
Install counts keep rising while D30 retention falls, and paid installs stop paying back.
LTV/CAC is unclear
Blended monetisation and shaky retention make it hard to know if growth is profitable.

Model your app's economics
Edit CPI and retention and watch LTV, payback, and LTV/CAC recompute, then test improving retention versus scaling paid acquisition.
Model installs and CPI, retention cohorts and a blended monetisation mix into LTV/CAC, with each figure traced to the cohort behind it.
- Assumptions
- Model
- Scenarios
- Mentor Review
- Outputs
AI mentorCurrent retention and monetisation: LTV clears CAC with a seven-month payback.
One model, connected from the first input to the final output
Change CPI or D30 retention and LTV, payback and LTV/CAC rerun. Better retention sits next to more paid spend, and the mentor flags when UA outruns payback.
Edit CPI and D30 retention
LTV, payback, and LTV/CAC recompute
Compare base, D30-up, and more paid spend
Flags when UA spend outruns payback
App-economics pitch pack
Illustrative example.

Where install growth meets payback
When each cohort of installs earns back what it cost to acquire.
Paid installs cost money on day one and earn it back over months. This model follows each cohort until it covers its install cost, or shows that it never will.
- Install mix
- Monetisation
- Retention curves
Spend and monetisation calls you can make
User-acquisition and monetisation calls, each checked against cohort payback rather than install counts.
What the mobile app model covers
Install mix
Model paid and organic installs, and the cost behind each.
Monetisation
Subscriptions, ads and in-app purchases combined into revenue per user.
Retention curves
Lifetime value calculated from D1, D7 and D30 retention by cohort, not an assumed lifetime.
LTV vs CAC
See the point where lifetime value clears acquisition cost.
From installs to LTV against CAC
- Step 1
Set install sources
Paid and organic installs and their costs.
- Step 2
Model monetisation
Subscriptions, ads and IAP into revenue per user.
- Step 3
Add retention
Retention curves shape LTV by cohort.
- Step 4
Check LTV/CAC
See whether growth spend pays back, and in which month.
More than a spreadsheet, more than a consultant
| Feature | Spreadsheetthe old way | Consultantbilled per engagement | Startup Suiteconnected workspace |
|---|---|---|---|
| Paid + organic installs with cost per source | Manual | ||
| Retention curves (D1/D7/D30) drive LTV | Hard | ||
| Monetisation mix (ads / IAP / subs) | Tabs | On request | |
| AI mentor explains the LTV/CAC risk | Hourly | ||
| App-economics pitch pack output |
- Paid + organic installs with cost per source
- Manual
- Retention curves (D1/D7/D30) drive LTV
- Hard
- Monetisation mix (ads / IAP / subs)
- Tabs
- AI mentor explains the LTV/CAC risk
- App-economics pitch pack output
- Paid + organic installs with cost per source
- Retention curves (D1/D7/D30) drive LTV
- Monetisation mix (ads / IAP / subs)
- On request
- AI mentor explains the LTV/CAC risk
- Hourly
- App-economics pitch pack output
- Paid + organic installs with cost per source
- Retention curves (D1/D7/D30) drive LTV
- Monetisation mix (ads / IAP / subs)
- AI mentor explains the LTV/CAC risk
- App-economics pitch pack output
Pick the version closest to your business
Subscription apps
Recurring in-app revenue: model trial conversion, churn and LTV the way a SaaS company would.
Sample output: Subscription LTV model
See the Subscription apps modelFree-to-play & gaming
IAP and ad monetisation: model how spend concentrates in top payers, ARPDAU and retention by cohort.
Sample output: ARPDAU model
Ad-supported media
Impressions and fill rate: model ARPDAU from ad revenue against UA cost.
Sample output: Ad revenue model
Creator & media apps
Audience growth to revenue: model engagement, retention and blended monetisation.
Sample output: Engagement-to-revenue model
App economics questions
Do you model paid and organic installs?
It's built to. Install sources and their costs are modelled separately, so blended CAC shows how much of your growth is paid for.
Does it handle subscriptions, ads, and IAP?
It's designed to. Each revenue stream is modelled separately and combined into revenue per user, and LTV comes from your retention curves.
What is a mobile app financial model?
It models installs and cost per install, retention curves (D1/D7/D30) and a blended monetisation mix into ARPU and LTV, then checks whether LTV clears CAC.
Is this just a spreadsheet template?
No. Templates often assume a fixed user lifetime. Here LTV comes from your D1, D7 and D30 curve, so a 2-point drop in D30 changes payback for every cohort after it.
What outputs does it produce?
It's built to produce a retention-cohort model, an LTV/CAC model and an app-economics pitch pack. Every figure traces to an assumption.
Related business models
See all solutionsCheck that your app's growth pays back
Enter your CPI and D1, D7 and D30 retention, and see LTV and payback for each cohort.