Tell HN: Warning: Third-Party Services Can Cost Mobile Apps Too Much

Many guides suggest building mobile apps by combining outside services. From our audits, this approach can quickly eat into a small app’s budget.

We often see apps where hosting on AWS or GCP costs around $200 per month, but outside services like Twilio, Google Maps, or other data providers run more than $3,000 per month.

Free tiers make it easy to ignore efficiency. Common issues we see: - Location checks: The app asks for location updates constantly instead of only when the user moves a set distance. - External data requests: Paid financial or weather data is requested every time a screen loads instead of saving it locally for 15 minutes. - SMS login messages: No limits on messages, so bot attacks generate real bills.

We spend more time fixing these inefficiencies, caching data and limiting outside calls, than we do adding new features. In many cases, using outside services ends up costing more than building a simple in-house solution.

Are developers paying too little attention to ongoing service costs in the push to launch apps quickly?