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App Size Optimization Template for PMs
Reduce mobile app binary size with a structured audit, asset optimization plan, code splitting strategy, and size budgets.
Updated 2026-03-05
App Size Optimization
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Frequently Asked Questions
What is a good target app size?+
For most consumer apps, keep the download size under 50 MB. This ensures users on cellular connections (where App Store caps downloads at 200 MB without WiFi) have a smooth install experience. For B2B apps used primarily on WiFi, 100 MB is acceptable but still worth optimizing. The [mobile analytics plan template](/templates/mobile-analytics-plan-template) can help you track how size affects your specific install funnel.
Should I use on-demand resources or download everything upfront?+
Move anything that is not needed in the first session to on-demand download. Onboarding assets, tutorial videos, advanced feature assets, and rarely-used sticker packs are all good candidates. The tradeoff is that users on poor connections may see loading states. Design fallbacks for offline scenarios using the [offline sync template](/templates) if your app needs to work without connectivity.
How do I prevent app size from growing back after optimization?+
Add size checks to your CI pipeline. Measure the AAB/IPA size after every build and fail the pipeline if it exceeds your budget or grows more than your per-release cap. This forces developers to think about size impact when adding features or dependencies. Review the budget quarterly and adjust as the product evolves.
What is the biggest single cause of app bloat?+
Images and media assets, almost always. In most apps, 40-70% of the binary is image assets. Converting to WebP, removing unused assets, and moving non-critical images to CDN download typically recovers 20-40% of total app size with relatively low engineering effort.
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