Firebase
Google-backed backend, analytics, crash reporting, and messaging suite.
Best for
- Google ecosystem apps
- Realtime app backends
- Crashlytics
Not good for
- Teams that require a relational-first data model
Pros and cons
Pros
- The always-free tier bundles Analytics, Crashlytics, Cloud Messaging, and Remote Config, so you get production-grade monitoring and push without adding a paid service.
- A single SDK covers auth, database, storage, and functions, which cuts the number of vendors a solo developer has to wire together and maintain.
- Cloud Firestore syncs data across devices in near real time and works offline, so shared or multi-device app state is handled for you.
- The Spark plan lets you build and launch without a payment method, and Blaze only starts charging once you pass the free quotas.
Cons
- Blaze bills per unit of usage through Google Cloud, so an inefficient query or a traffic spike can produce a surprising bill without budget alerts in place.
- Firestore security rules are a separate language you must learn and test, and one permissive rule can expose your whole database.
- Migrating away is hard because your data lives in a proprietary document model and your app depends on Google's SDK conventions.
- Ad-hoc reporting and complex queries are awkward on a document store, so heavy analysis often means exporting data to BigQuery.
Firebase is Google's app development platform. It bundles authentication, two NoSQL databases (Cloud Firestore and the Realtime Database), file storage, serverless Cloud Functions, hosting, and a large free monitoring layer (Analytics, Crashlytics, Cloud Messaging, and Remote Config) behind one SDK. For a solo iOS developer, the draw is breadth: add sign-in, sync data across devices, send push notifications, and watch crashes land in Crashlytics without running a server.
Where it fits less well: Firestore and the Realtime Database are document stores, not relational tables, so if your data is highly relational and you want SQL, joins, and constraints, a Postgres-backed option like Supabase is a better fit. Firebase also ties you to Google Cloud billing and conventions, which some builders prefer to avoid.
Pricing
Firebase has two plans: the no-cost Spark plan and the pay-as-you-go Blaze plan.
Firebase plans (checked July 19, 2026)
| Plan | Price | What is included |
|---|---|---|
| Spark | $0 per month | Free quotas including 50,000 Authentication monthly active users, 1 GiB Firestore storage, 50,000 reads and 20,000 writes per day, 2 million Cloud Functions calls per month, and 10 GB hosting |
| Blaze | Pay-as-you-go on top of the free quotas | Everything in Spark plus metered usage past the free tier, for example $0.40 per million Cloud Functions calls; eligible accounts get $300 in credit |
Analytics, Crashlytics, Cloud Messaging, App Distribution, Performance Monitoring, and Remote Config stay free on both plans, and Blaze bills through Google Cloud so costs track real usage. Pricing last checked July 19, 2026; confirm current numbers on the official pricing page.
Setup and integration
Firebase provides a native iOS SDK you add with Swift Package Manager, plus SDKs for Android, Web, Flutter, and Unity. You create a project in the Firebase console, download the GoogleService-Info.plist file into your Xcode target, and import only the modules you use, such as Auth, Firestore, or Crashlytics. Expect an afternoon to get sign-in and a first database read working.
Two gotchas are worth planning for. Firestore security rules are their own language and are easy to leave too open, so budget time to write and test them before launch. And because Blaze is metered, a runaway query or a misconfigured client can drive real cost, so set budget alerts in Google Cloud early.
Frequently asked questions
Is Firebase free for a small app?
Yes, within the Spark quotas. A small iOS app can run on no-cost limits such as 50,000 authentication monthly active users and 50,000 Firestore reads per day (checked July 19, 2026), moving to Blaze only when you exceed them or need services Spark does not cover.
How is Firebase different from Supabase?
Both give you auth, a database, storage, and serverless functions behind an SDK. The core difference is the database: Firebase uses NoSQL document stores, while Supabase is built on Postgres with SQL, relations, and row-level security. Firebase leans realtime and document-first; Supabase leans relational.
Does Firebase cover analytics and crash reporting?
Yes. Google Analytics for Firebase, Crashlytics, and Performance Monitoring are free on both plans, which is why many iOS builders adopt Firebase for crash reporting even when their backend lives elsewhere.
Alternatives
Related comparisons
comparison
Supabase vs Firebase vs Appwrite for mobile app backends
How to choose between Postgres-first Supabase, Google-native Firebase, and open-source Appwrite for an indie mobile app backend.
comparison
Sentry vs Firebase Crashlytics for mobile apps
Compare Sentry and Firebase Crashlytics for crash reporting, errors, setup complexity, and release monitoring.
Related guides
guide
Crash reporting setup for a solo app launch
Set up crash reporting before launch with a minimum metadata checklist, release monitoring flow, and Sentry vs Firebase Crashlytics decision path.
guide
Subscription MVP stack for a solo iOS app
A practical stack map for solo iOS developers launching a subscription MVP with source-checked tool choices.