A reference on the DeepSeek app for iOS and Android — covering what the app does, how model switching between V3 and R1 works on mobile, how conversation history syncs across devices, when push notifications fire, platform availability, and the most common issues users encounter.
The DeepSeek app brings the full model family to mobile without cutting features for the smaller screen. Conversation history syncs automatically with the web interface when you are signed in, and R1 sessions send a push notification when the response is ready — so you do not have to hold the phone and wait.
The DeepSeek app is a native mobile client for the same hosted models as the web surface — not a stripped-down companion but a fully capable interface in a phone form factor.
The DeepSeek app is the iOS and Android client for DeepSeek's hosted model service. It exposes the same core features as the web chatbot — conversation creation, the V3 and R1 model picker, conversation history, and the ability to name and organise threads — adapted for a mobile viewport and native OS conventions. Installing the app is free; using it requires the same account that works on the web, or a new account created during the app's onboarding flow.
The practical reason to use the app over the mobile browser is the native experience: push notifications for long-running R1 sessions, a consistent interface that does not depend on a browser's rendering choices, and reliable conversation history sync that is triggered automatically rather than requiring a manual page reload. For users who move between laptop and phone during the day, the app closes the gap between mobile and desktop so that starting a conversation in one place and finishing it in another requires no extra steps.
The app is available in the App Store for iOS and Google Play for Android. Both stores offer the same feature set; OS-level differences in notification handling and background permissions are the main practical variation between platforms, discussed in the push notifications section below.
The DeepSeek app ships with the features that matter most for mobile: the full model family, synced history, and notifications designed around R1's longer latency.
The main chat interface in the DeepSeek app presents a conversation list on the app's home screen, a compose area at the bottom of each thread, and a model picker accessible when starting a new conversation. The layout adapts to both portrait and landscape orientations. The conversation list is sorted by recency and is searchable by thread title, which mirrors the web interface behaviour.
Code output in the app is rendered in a monospace block with a copy button, the same as on the web. Markdown formatting — headings, bullet lists, bold and italic text — renders correctly in the response area. For users who ask for structured output regularly, the app's renderer handles the same formatting conventions the web interface does, so prompts that produce clean output on the web produce the same result in the app.
The file attachment feature, where available, works through the native iOS share sheet or Android share intent, allowing you to pass a document from another app directly into a DeepSeek conversation. This is useful for reviewing documents on mobile — open a PDF in Files, share it to the DeepSeek app, and ask questions about it in the resulting conversation thread.
V3 and R1 are both available in the app — the model picker works the same way as on the web, with one important mobile-specific consideration around R1's response latency.
The DeepSeek app surfaces the model picker at the top of the compose area when creating a new conversation, identical to the web interface. Selecting V3 or R1 before the first message binds the thread to that model. V3 is the appropriate choice for the vast majority of mobile conversations — it is fast enough that responses arrive before you would typically put your phone down, and it handles drafting, summarisation, translation, and light coding questions without issue.
R1 on mobile requires a bit more intentionality. R1's inference-time chain-of-thought means responses take noticeably longer — often tens of seconds to a minute for complex problems. On mobile, that latency is more intrusive than on a desktop, where you might switch to another window. The app's push notification system is specifically designed to address this: start an R1 session, put your phone down or switch to another app, and receive a notification when the response is ready. This makes R1 usable on mobile for genuinely hard problems without requiring you to watch a loading indicator.
The model is fixed per conversation thread on mobile, the same as on the web. If you want to follow up a V3 conversation with R1 analysis, start a new thread and briefly carry the relevant context forward. A two-sentence summary of the prior context is usually sufficient to ground the R1 session.
Signed-in accounts sync automatically — every thread you start on the web appears in the app, and vice versa, without manual steps.
Conversation history in the DeepSeek app syncs automatically across mobile and web when you are signed in to the same account. The sync is near-real-time for active sessions: a conversation started on the web will appear in the app's conversation list within a few seconds of the first message. Older conversations sync on app launch and on pull-to-refresh in the conversation list.
The sync covers the full conversation — messages, model metadata, and thread names. If you have renamed a thread on the web, that name appears in the app's conversation list. If you delete a conversation on one surface, it is removed from the other on the next sync cycle.
Sync requires an active network connection. The app does not cache conversations for offline reading in the current version; if you open a thread without connectivity, the message history may not load. For users in areas with intermittent connectivity, waiting for a solid connection before opening long threads avoids partial-load states.
R1's longer response time is the reason push notifications exist in this app — they turn a potentially frustrating wait into a fire-and-forget workflow.
The DeepSeek app sends a push notification when an R1 reasoning response is ready. The notification appears in the device's notification centre with a brief preview of the response and a tap-to-open action that returns you directly to the relevant conversation thread. Notification delivery requires that you have granted notification permissions to the app during onboarding or in the device's Settings.
On iOS, notification permissions must be granted explicitly; the app will prompt on first launch. If you dismissed the prompt without granting, you can re-enable notifications in Settings → Notifications → DeepSeek. On Android, notification behaviour varies by manufacturer and OS version; some devices apply aggressive battery optimisation that delays or suppresses background notifications. If R1 notifications are not arriving reliably on Android, checking the app's battery optimisation settings and adding DeepSeek to the "unrestricted" list in the OS battery settings resolves most cases.
V3 responses are fast enough that push notifications are not sent for them by default. The notification system is specifically calibrated to R1's response-time profile, where the delay is long enough to be meaningful as a notification trigger.
iOS and Android are both fully supported; the minimum OS version requirements follow the standard tier-two support policy common to most AI service apps.
The DeepSeek app is available on the App Store for devices running iOS 16 or later, and on Google Play for Android 9 or later. Both stores list the current version and the release notes for recent updates. The app uses standard platform SDKs and does not require unusual permissions beyond network access, notification delivery, and the share-sheet integration for file attachments.
Regional availability on the app stores follows the platform policies of Apple and Google in each market. In some regions, the app may not be listed in the local store; in those cases, the mobile browser interface at the web chatbot URL is the alternative access path.
The three most common app issues all have straightforward resolutions that do not require reinstalling.
Slow R1 responses on mobile are almost always a network issue rather than a model issue. R1's chain-of-thought streaming requires a sustained connection; on a poor signal, the response may arrive slowly or time out mid-stream. Moving to a better connection or switching to Wi-Fi resolves this without any app-side change.
Push notifications not arriving typically trace back to OS-level notification permissions rather than app settings. On iOS, check Settings → Notifications → DeepSeek and confirm that Allow Notifications is enabled. On Android, check the battery optimisation setting for the app, as aggressive background-kill policies on some manufacturer skins suppress notification delivery.
Conversation history not appearing after a long offline period resolves with a pull-to-refresh gesture on the conversation list. The app does not auto-sync in the background on all OS configurations; an explicit refresh triggers the sync on demand.
The table below maps the main app features to their typical mobile use cases and relevant notes for practitioners using the DeepSeek app as part of a daily workflow.
| Feature | Mobile use case | Notes |
|---|---|---|
| V3 chat | Quick drafts, lookups, and summarisation on the go | Responses fast enough for in-conversation use without notification support needed |
| R1 reasoning | Complex analysis sessions started and resumed later | Pair with push notifications so you can leave the app while R1 works through the problem |
| Conversation history sync | Continuing web sessions on mobile | Automatic for signed-in accounts; pull-to-refresh forces an immediate sync |
| Push notifications | R1 session completion alerts | Requires OS notification permission; check battery optimisation on Android if unreliable |
| File attachment via share sheet | Document review and Q&A on mobile files | Use the iOS share sheet or Android share intent from a file manager or document app |
For mobile AI application accessibility standards and interaction design guidance, the W3C Web Accessibility Initiative publishes mobile accessibility principles that apply to native apps as well as web interfaces.
Five questions covering what users most commonly ask when setting up and using the DeepSeek app on iOS and Android.
Yes. The DeepSeek app is available on both iOS via the App Store and Android via Google Play. Both versions provide access to the same hosted models — V3 for general chat and R1 for reasoning-intensive tasks — and share conversation history with the web interface when you are signed in to the same account. Regional availability follows each platform's store policies.
Conversation history syncs automatically across the mobile app and the web chatbot when you are signed in to the same account. Starting a conversation on your laptop and continuing it on your phone works without any manual export step. Sync requires an active internet connection; if history is not appearing after an offline period, a pull-to-refresh gesture in the conversation list triggers an immediate sync.
Yes. The DeepSeek app sends push notifications when long-running R1 reasoning sessions complete. Because R1's inference-time chain-of-thought can take considerably longer than a V3 response, the notification lets you leave the app and return when the answer is ready. Notifications require OS-level permission; on iOS, check Settings → Notifications → DeepSeek, and on Android, verify battery optimisation settings.
Yes. The model picker appears at the start of a new conversation in the compose area, identical to the web interface. V3 is the default for everyday tasks; R1 is the choice for complex reasoning, math, or multi-step debugging sessions. The model is fixed per conversation thread once the first message is sent. Use push notifications when running R1 sessions so you can leave the app while it works.
The three most common issues are slow R1 responses on poor mobile connections (switch to Wi-Fi), push notifications not arriving due to OS-level notification permission being denied (re-enable in device Settings), and conversation history not syncing after a long offline period (use pull-to-refresh in the conversation list). None of these require reinstalling the app.