--- title: Announcing Mobile Offline Support | daily.dev description: Firebase announced offline support for its iOS and Android SDKs, letting apps persist synchronized data to disk so it's available immediately on startup and... canonical: https://daily.dev/posts/announcing-mobile-offline-support-tmwlaqmym twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Announcing Mobile Offline Support | daily.dev og:description: Firebase announced offline support for its iOS and Android SDKs, letting apps persist synchronized data to disk so it's available immediately on startup and... og:url: https://daily.dev/posts/announcing-mobile-offline-support-tmwlaqmym og:image: https://api.daily.dev/og/posts/tMWlAQMym.png og:image:alt: Announcing Mobile Offline Support og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Announcing Mobile Offline Support **[Firebase](https://daily.dev/sources/firebase-blog)** · 3 min read · 0 upvotes · 0 comments ## Summary Firebase announced offline support for its iOS and Android SDKs, letting apps persist synchronized data to disk so it's available immediately on startup and works without a network connection. Developers can enable disk persistence with a single line of code and use a new keepSynced feature to prefetch and keep specific data paths up to date for offline access. The database's architecture routes all reads and writes through a local on-device copy first, then syncs with servers, which the team says makes offline support a natural extension of its existing design. Citrix's Talkboard app had been beta testing the feature since 2013. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How do I enable offline disk persistence in the Firebase SDK for iOS or Android? Set persistenceEnabled to true on the default Firebase configuration with one line of code, for example Firebase.getDefaultConfig().setPersistenceEnabled(true) on Android or [Firebase defaultConfig].persistenceEnabled = YES on iOS. This persists synchronized data to disk so it is available immediately when the app restarts, even without a network connection. _daily.dev surfaces SDK updates like this for developers building resilient offline-capable mobile apps._ ### How do I keep specific Firebase database paths available offline? Call keepSynced(true) on a database reference to have that path prefetched and continuously kept up to date, ensuring it remains available offline later. This works on a per-path basis, so only the data you mark is kept synchronized rather than the entire database. _developers weighing offline data strategies can track these SDK capabilities on daily.dev._ ### Why can Firebase support offline mode so effectively compared to typical request/response databases? Firebase routes all reads and writes through a local, on-device version of the database first, then pushes and pulls data from servers in the background, rather than using a direct request/response model. This design, built in from the start, lets the SDK serve data from whichever source is available and automatically reconcile local changes with the server once connectivity returns. _daily.dev helps developers comparing database architectures follow how offline-first designs like this evolve._ ## Similar posts on daily.dev - [Offline-first frontend apps in 2025: IndexedDB and SQLite in the browser and beyond](https://daily.dev/posts/offline-first-frontend-apps-in-2025-indexeddb-and-sqlite-in-the-browser-and-beyond-djyieqljy) · LogRocket · 1 upvotes · 0 comments - [The Complete Guide to Offline-First Architecture in Android](https://daily.dev/posts/the-complete-guide-to-offline-first-architecture-in-android-jhpom6lhe) · droidcon · 0 upvotes · 0 comments - [How we made Notion available offline](https://daily.dev/posts/how-we-made-notion-available-offline-jre2nc2fl) · Programming Digest · 47 upvotes · 2 comments - [Offline-First Android Architecture: The Complete Engineering Guide](https://daily.dev/posts/offline-first-android-architecture-the-complete-engineering-guide-4w5ysrp8r) · Medium · 0 upvotes · 0 comments - [When the Internet Goes Down, Your Business Shouldn’t](https://daily.dev/posts/when-the-internet-goes-down-your-business-shouldn-t-ai2sxv1a1) · Couchbase · 0 upvotes · 0 comments --- Tags: [#mobile](https://daily.dev/tags/mobile), [#ios](https://daily.dev/tags/ios), [#firebase](https://daily.dev/tags/firebase), [#offline-first](https://daily.dev/tags/offline-first) [View this post on daily.dev](https://daily.dev/posts/announcing-mobile-offline-support-tmwlaqmym) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Announcing Mobile Offline Support","url":"https://daily.dev/posts/announcing-mobile-offline-support-tmwlaqmym","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/announcing-mobile-offline-support-tmwlaqmym"},"datePublished":"2026-08-23T12:20:16.891Z","dateModified":"2026-08-23T12:28:51.277Z","description":"Firebase announced offline support for its iOS and Android SDKs, letting apps persist synchronized data to disk so it's available immediately on startup and...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7ed721de96163685d26ab7e314be3ebc?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7ed721de96163685d26ab7e314be3ebc?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Firebase","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Firebase","logo":"https://media.daily.dev/image/upload/s--i395oqZH--/f_auto,q_auto/v1787487448/logos/firebase-blog?_a=BAMAMicg0","url":"https://daily.dev/sources/firebase-blog"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/announcing-mobile-offline-support-tmwlaqmym","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"mobile,ios,firebase,offline-first","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Firebase","item":"https://daily.dev/sources/firebase-blog"},{"@type":"ListItem","position":3,"name":"Announcing Mobile Offline Support"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/announcing-mobile-offline-support-tmwlaqmym#faq","mainEntity":[{"@type":"Question","name":"How do I enable offline disk persistence in the Firebase SDK for iOS or Android?","acceptedAnswer":{"@type":"Answer","text":"Set persistenceEnabled to true on the default Firebase configuration with one line of code, for example Firebase.getDefaultConfig().setPersistenceEnabled(true) on Android or [Firebase defaultConfig].persistenceEnabled = YES on iOS. 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