Budget feature flagging service for small team mobile apps

(Best for easiest mobile integration)

Cost: Free tier allows up to 100,000 fetch requests per day; pricing changed September 1, 2026.firebase.google.com

Why choose it: Official iOS, Android, Flutter and Unity support, built-in caching and defaults, plus conditional targeting and rollouts.firebase.google.com

Trade-off: More of a remote configuration system than a dedicated feature management platform.

Documentation ·Pricing

2. PostHog

(Best all-rounder)

Cost: Free tier includes 1 million feature flag requests per month.posthog.com

Why choose it: Feature flags, percentage rollouts, user targeting, remote configuration and analytics in one platform.posthog.com

Trade-off: More functionality to learn and configure if you only need a few simple toggles.

Documentation ·Pricing

3. GrowthBook

Cost: Free cloud plan for up to 3 users, with unlimited flags and experiments.www.growthbook.io

Why choose it: Good for small teams that want feature flags and A/B testing, with open-source and self-hosted options.

Trade-off: More setup and architectural decisions may be needed than with a mobile-first service.

Website ·Pricing

My recommendation

I'd start with Firebase Remote Config if your app already uses Firebase, or if you want straightforward feature toggles without introducing another platform. If you want more sophisticated release controls and analytics, I'd choose PostHog instead.

One important consideration: feature flags in a mobile app should have safe local defaults, because a device may be offline or unable to fetch updated settings. Also, never rely on client-side flags to enforce authorization or protect secrets.

One question that would help me narrow this down: What is your mobile app built with — native iOS (Swift), native Android (Kotlin), React Native, or Flutter?

Top Recommendation: ConfigCat

ConfigCat is widely considered the best straightforward, budget-friendly feature flag tool for small teams.[configcat.com](https://www.harness.io/blog/feature-flag-tools-compared-10-best-platforms-for-safer-releases)[[2](https://rollgate.io/blog/feature-flags-pricing-comparison)](https://configcat.com/blog/top-launchdarkly-alternatives/)

• Why it's affordable: It features unlimited team members , meaning you won't get billed extra as you add developers, QA, or product managers. Instead, it prices based on config JSON downloads/traffic. They offer a generous Forever Free tier (5 million downloads/month), and their Pro tier starts at a predictable $110/month.[configcat.com](https://configcat.com/pricing/)[[2](https://rollgate.io/blog/feature-flags-pricing-comparison)](https://configcat.com/blog/top-launchdarkly-alternatives/)
• Why it's easy to integrate: It provides robust, lightweight SDKs for iOS (Swift), Android (Kotlin/Java), React Native, and Flutter. Setup takes minutes because the mobile SDK downloads a small config JSON file locally and evaluates flags instantly offline without hitting network bottlenecks on every single screen load.
• Best for: Teams that want a "set-it-and-forget-it" flag manager with zero per-seat friction.[configcat.com](https://www.harness.io/blog/feature-flag-tools-compared-10-best-platforms-for-safer-releases)[[2](https://rollgate.io/blog/feature-flags-pricing-comparison)](https://configcat.com/blog/top-launchdarkly-alternatives/)[[3](https://www.harness.io/blog/feature-flag-tools-compared-10-best-platforms-for-safer-releases)](https://rollgate.io/blog/feature-flags-pricing-comparison)

Alternative Recommendation: PostHog

PostHog is an all-in-one product analytics, session replay, and feature flagging platform.[configcat.com](https://amplitude.com/compare/posthog-vs-launchdarkly)[[2](https://rollgate.io/blog/feature-flags-pricing-comparison)](https://configcat.com/blog/top-launchdarkly-alternatives/)

• Why it's affordable: Like ConfigCat, it charges strictly on usage rather than per-seat. You get 1 million feature flag requests free every month , with very cheap tiered pricing after that. If you are already using PostHog for analytics or session tracking in your mobile app, consolidating tools means you don't need a separate SDK.[configcat.com](https://posthog.com/experiments/pricing)
• Why it's easy to integrate: If you already track events in your app via PostHog, adding flags is just an extension of the existing client. However, mobile apps can generate high request volumes quickly if misconfigured, so you have to mind client-side caching to avoid unexpected spikes in flag evaluation requests.[configcat.com](https://posthog.com/docs/feature-flags/cutting-costs)
• Best for: Small teams that want feature flags tightly coupled with user analytics and session data.[configcat.com](https://configcat.com/blog/top-launchdarkly-alternatives/)[[2](https://rollgate.io/blog/feature-flags-pricing-comparison)](https://amplitude.com/compare/posthog-vs-launchdarkly)

Comparison at a Glance

• ConfigCat
  • Pricing Model: Flat-rate / Traffic-based (Unlimited seats)
  • Free Tier: 5M requests/mo
  • Mobile SDKs: Swift, Kotlin, Flutter, React Native, Unity
  • Ideal Use Case: Pure feature flagging and percentage rollouts with zero per-user penalties.[configcat.com](https://configcat.com/pricing/)[[2](https://rollgate.io/blog/feature-flags-pricing-comparison)](https://configcat.com/blog/top-launchdarkly-alternatives/)[[3](https://www.harness.io/blog/feature-flag-tools-compared-10-best-platforms-for-safer-releases)](https://www.harness.io/blog/feature-flag-tools-compared-10-best-platforms-for-safer-releases)
• PostHog
  • Pricing Model: Usage-based per request (Unlimited seats)
  • Free Tier: 1M flag requests/mo
  • Mobile SDKs: iOS, Android, React Native, Flutter
  • Ideal Use Case: Combining feature flags with product analytics and session replays.[configcat.com](https://posthog.com/experiments/pricing)[[2](https://rollgate.io/blog/feature-flags-pricing-comparison)](https://amplitude.com/compare/posthog-vs-launchdarkly)[[3](https://www.harness.io/blog/feature-flag-tools-compared-10-best-platforms-for-safer-releases)](https://.com/blog/top-launchdarkly-alternatives/)

To help narrow this down, tell me:

• What framework/language is your mobile app built in (Native iOS/Android, Flutter, React Native)?
• Do you also need product analytics bundled in, or just pure feature toggling?

To help narrow this down, tell me:

• What is your tech stack for mobile (Native iOS/Android, React Native, or Flutter)?
• Roughly how many Monthly Active Users (MAUs) do you expect to have in the next 6 to 12 months?