Open4ID
Free: 1 app · 1,000 MAU
Open4ID
Cross-platform Player Identity
Guest, Apple, Google and more. Link accounts and keep your players.
FOR MOBILE GAME STUDIOS
One SDK
for Mobile Games
Player identity, in-app purchases and entitlements made simple. Integrate once and focus on your game.
Get Started FreeFree: 1 app · 1,000 MAUNo credit card requiredReady for production
Open4ID
SDK
SDK
Player IdentityGuest, Apple, Google and more
In-App PurchasesVerify and restore
EntitlementsUnlock content
Built for MobileSimple. Fast. Reliable.
Everything you need for your mobile game
Powerful features without the enterprise complexity.
IAP Integration Made Simple
Handle purchases, receipt verification and restoration.
Unified Entitlements
One entitlement system across App Store and Google Play.
Built for Indie Teams
No backend team required. Save time and ship faster.
One integration. Multiple platforms.
Use a single SDK and let Open4ID handle the complexity.
App Store IAP
App Store IAPGoogle Play Billing
Google Play Billing
Open4ID
SDK
SDK
Player Identity
Purchase Verification
Entitlements
Analytics (optional)
Simple, transparent pricing
Start free. Upgrade as you grow — or pay only for what you use.
Free
$0 / month
- ✓ Applications: 1
- ✓ MAU: 500
- ✓ Transactions / month: 50
- ✓ SDK keys: 3
- ✓ Webhook endpoints: None
- ✓ Community support
Kick-Off
$0.99 / month
- ✓ Applications: 1
- ✓ MAU: 1,000
- ✓ Transactions / month: 150
- ✓ SDK keys: 3
- ✓ Webhook endpoints: None
- ✓ Server callback + full IAP
- ✓ Sales breakdown + transaction list
- ✓ Priority email support
Starter
$9.99 / month
- ✓ Applications: 3
- ✓ MAU: 5,000
- ✓ Transactions / month: 1,000
- ✓ SDK keys: 9
- ✓ Webhook endpoints: 3
Indie
$19 / month
- ✓ Applications: 3
- ✓ MAU: 10,000
- ✓ Transactions / month: 2,000
- ✓ SDK keys: 9
- ✓ Webhook endpoints: 5
- ✓ Social providers + store IAP
- ✓ Email support
Enterprise
Let’s talk
- ✓ Unlimited apps, MAU & transactions
- ✓ All features + custom entitlements
- ✓ Unlimited SDK keys & webhooks
- ✓ Dedicated support + SLA
- ✓ On-premise option
Pro
$49 / month
- ✓ Applications: 10
- ✓ MAU: 100,000
- ✓ Transactions / month: 10,000
- ✓ SDK keys: 30
- ✓ Webhook endpoints: 20
- ✓ Account linking + price sync
- ✓ Entitlements + events
- ✓ Priority support + SLA
Ready to simplify your mobile game?
Join indie and small studios building with Open4ID.
Questions, answered
What studios ask before they integrate Open4ID.
What is Open4ID?
Open4ID is one SDK and hosted API for player identity, in-app purchases and entitlements in mobile games. Your game calls the SDK to sign players in and to submit a purchase, and Open4ID verifies the App Store or Google Play proof on its servers before it grants an entitlement — so you do not build or run that backend yourself.
How much does Open4ID cost?
There is a free plan with one application, 1,000 monthly active users and a monthly transaction allowance — no credit card required. Paid plans add more applications, MAU and transactions, pay-as-you-go bills per application, MAU and transaction, and Enterprise pricing is negotiated. The pricing section above always shows the current prices and limits.
Which platforms and stores are supported?
iOS and Android, with server-side verification for App Store (StoreKit) and Google Play Billing purchases. Open4ID ships SDKs for Android, iOS, Flutter and JavaScript, and games that keep their own purchase UI — Unity IAP, RevenueCat or native billing — can submit the store proof for verification instead.
Do I need a backend team to use it?
No. Sign-in, receipt verification, entitlement state and purchase restore run in the hosted Open4ID API; your game calls the SDK and reads entitlements. Server-to-server verification is available when your own backend needs to check a player token or a purchase.
What counts as a monthly active user (MAU)?
A player who is active in your game during the calendar month. Each plan includes a monthly MAU allowance and a monthly transaction allowance, and the dashboard shows current usage against them so you can upgrade or move to pay-as-you-go before you outgrow a plan.
How is player data handled?
Open4ID processes player data as a processor for your studio: your game decides what is collected and your privacy policy applies to players. Account data, retention, deletion and cookies are described in the Privacy Policy, GDPR page and Cookie Policy linked in the footer.