> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tryhelium.com/llms.txt
> Use this file to discover all available pages before exploring further.

# SDK Features Availability

> See what is currently available for each SDK.

*Last updated on: 2/2/26*

| Feature                                                 | iOS | Android | ReactNative | Flutter |
| :------------------------------------------------------ | :-: | :-----: | :---------: | :-----: |
| **Purchase Handling**                                   |     |         |             |         |
| Default purchase delegate                               |  ✅  |    ✅    |      ✅      |    ✅    |
| Custom purchase delegate                                |  ✅  |    ✅    |      ✅      |    ✅    |
| RevenueCat delegate                                     |  ✅  |    ✅    |      ✅      |    🚫   |
| **Helium Events**                                       |     |         |             |         |
| Listen for events via delegate                          |  ✅  |    ✅    |      ✅      |    ✅    |
| Add global event listener                               |  ✅  |    ✅    |      🚫     |    🚫   |
| Paywall event handlers                                  |  ✅  |    ✅    |      ✅      |    ✅    |
| Custom paywall actions                                  |  ✅  |    ✅    |      ✅      |    ✅    |
| **Paywall Options**                                     |     |         |             |         |
| Second try flow                                         |  ✅  |    ✅    |      ✅      |    ✅    |
| "Should Show" for presented paywall                     |  ✅  |    ✅    |      ✅      |    ✅    |
| Dark mode support                                       |  ✅  |    ✅    |      ✅      |    ✅    |
| Disable scroll                                          |  ✅  |    ✅    |      ✅      |    ✅    |
| Automatic safe area support                             |  ✅  |    🚫   |      ✅      |    ✅    |
| Intro offers                                            |  ✅  |    ✅    |      ✅      |    ✅    |
| **Presentation Options**                                |     |         |             |         |
| Modal presentation                                      |  ✅  |    ✅    |      ✅      |    ✅    |
| Modal presentation callbacks                            |  ✅  |    ✅    |      ✅      |    ✅    |
| Embedded view                                           |  ✅  |    ✅    |      🚫     |    ✅    |
| Embedded view callbacks                                 |  ✅  |    ✅    |      🚫     |    ✅    |
| **Loading State**                                       |     |         |             |         |
| For modal presentation                                  |  ✅  |    ✅    |      ✅      |    ✅    |
| For embedded view                                       |  ✅  |    ✅    |      🚫     |    🚫   |
| Loading budget customizable                             |  ✅  |    ✅    |      ✅      |    ✅    |
| Loading budget per trigger                              |  ✅  |    ✅    |      ✅      |    ✅    |
| **Fallbacks**                                           |     |         |             |         |
| Fallbacks support                                       |  ✅  |    ✅    |      ✅      |    ✅    |
| onFallback callback with presentUpsell                  |  ✅  |    ✅    |      ✅      |    🚫   |
| forceShowFallback flag                                  |  ✅  |    🚫   |      ✅      |    ✅    |
| **Entitlements**                                        |     |         |             |         |
| Option to check entitlements for paywall before showing |  ✅  |    ✅    |      ✅      |    ✅    |
| hasAnySubscription/hasAnyEntitlement helpers            |  ✅  |    ✅    |      ✅      |    ✅    |
| Entitlement persistence                                 |  ✅  |    🚫   |      🚫     |    🚫   |
| Cache per-trigger entitlement                           |  ✅  |    🚫   |      🚫     |    🚫   |
| **Testing**                                             |     |         |             |         |
| QR code scan                                            |  ✅  |    ✅    |      ✅      |    ✅    |
| **Logging**                                             |     |         |             |         |
| Logging levels                                          |  ✅  |    ✅    |      🚫     |    🚫   |
| **Analytics**                                           |     |         |             |         |
| Custom user traits                                      |  ✅  |    ✅    |      ✅      |    ✅    |
| Custom paywall traits                                   |  ✅  |    ✅    |      ✅      |    ✅    |
| Revenue tracking                                        |  ✅  |    ✅    |      ✅      |    ✅    |
| **Experimentation**                                     |     |         |             |         |
| Allocations                                             |  ✅  |    ✅    |      ✅      |    ✅    |