Where does this tool process my inputs?

The calculation runs in browser JavaScript and does not fetch or send billing or analytics data.

App Backend Cost per MAU Calculator

How to Use This Tool

Enter the cloud, usage-based vendor and support costs for one app and month, then divide their sum by your product’s chosen monthly active-user count.

Why Backend Cost per MAU needs more than a raw total

Count only costs assigned to this app. Use one month and the same product-level MAU definition for the numerator and denominator; avoid counting a vendor or support expense twice.

The scenario raises cloud infrastructure cost by 10% while holding vendor costs, support allocation and MAU constant.

How this cost per MAU is calculated

Cost per MAU = (monthly cloud costs + monthly usage-based vendor costs + monthly support allocation) ÷ monthly active users. Include costs for the same app and calendar month. This estimate includes only the three expense fields shown.

Interpreting backend cost per mau

Compare this unit cost over time alongside usage and reliability. The cloud +10% scenario is a sensitivity check, not a forecast; it keeps vendor cost, support cost and MAU unchanged.

What this Backend Cost per MAU model leaves out

Engineering payroll, shared-company overhead, credits, annual commitments and costs not entered above are excluded. Add an expense to one of the monthly cost fields only if you intend it to be part of this per-user estimate.

Evidence and independent verification

Use a consistent in-product MAU definition. Apple App Store Connect separately reports active-device metrics, including “Active in Last 30 Days”; those device counts do not automatically equal a product’s MAU definition.

Private, reproducible calculation

The calculation runs in this browser. It does not fetch or send your billing details or analytics data.

Sources & assumptions

Formula reviewed 2026-10-28. Use your billing source and analytics definition for the month you are comparing.

Official references

Apple — App Store Connect Analytics metric definitions (checked 2026-10-28)

Model assumptions

All three cost inputs and the MAU denominator cover the same app and month.
Engineering payroll, shared-company overhead, credits, annual commitments and unentered costs are excluded.
The calculator uses the visible inputs and does not fetch billing or account data.

Frequently Asked Questions

How is backend cost per MAU calculated?

Add the three monthly costs shown on this page, then divide by the monthly active-user count for that same app and month.

Which costs belong in this estimate?

Include cloud infrastructure, usage-based vendor fees and technical support allocated to the same app and month. Avoid counting one invoice line twice.

What does the cloud cost +10% scenario show?

It increases only the cloud cost by 10%, holding vendor costs, support and MAU constant. This helps show how cloud-price changes affect cost per user; it is not a forecast.

Which MAU count should I use?

Use the MAU definition your product team chose for that month. Apple App Store Connect reports device-based metrics, which do not automatically equal every product’s MAU.

What costs are left out?

Only the three monthly cost inputs are included. Engineering payroll, company overhead, credits and annual commitments are excluded unless deliberately entered.

Where does Backend Cost per MAU process my inputs?

The calculation runs in browser JavaScript and does not fetch billing or analytics data.

Estimate Backend Cost per MAU

How the calculation works