How to Set Up DeepSeek on Mobile (iPhone and Android, 2026)

You want DeepSeek on mobile, you opened the App Store or Play Store, and you immediately saw a dozen lookalikes with whale logos. Which one is real, what does it actually do once installed, and how does it compare to the desktop chat? This tutorial answers those three questions in order, based on DeepSeek’s own download page, store listings and release notes as of October 2026. By the end of this guide you will have the official app installed and signed in, and you will know which features carry over from web to phone — and which do not.

What you’ll get from the official DeepSeek mobile app

The DeepSeek mobile app is the official consumer client from the Hangzhou-based AI lab; its store listings call it “DeepSeek – AI Assistant” and describe it as free. It runs the same models as the web chat: DeepSeek’s 17 October 2026 Change Log says the official web and app models were updated to DeepSeek-V4.1-Flash-1017, and its 13 August 2026 release notes said V4 Pro is available on the app and web via “Expert Mode”. When DeepSeek launched the April 2026 V4 preview, it also said 1M-token context had become the default across all its official services. On the consumer app you do not pick an API model ID; you use whatever mode options the app shows.

The mobile app and the API are two separate surfaces. The app keeps a chat history tied to your DeepSeek account (DeepSeek’s Privacy Policy, updated 10 February 2026, says you can manage, copy or delete it in settings). The API does not — clients must resend the full message history on every request to POST /chat/completions. If you only want to chat, the app is the right choice; if you want to build something, see DeepSeek API getting started.

Prerequisites

• An iPhone or iPad running iOS 15.0 or later (the minimum listed on the App Store as of 23 October 2026), or an Android phone. Google Play tells you on the listing whether the app is compatible with your device, so check there before installing.
• A working email address to create or sign in to a DeepSeek account.
• An internet connection. The app does not run models on-device — every prompt goes to DeepSeek’s servers.
• Some free storage for the install plus cache.
• Optional: a paid API key if you also want to call the same models programmatically.

Step 1 — Find the official app and avoid the clones

The single biggest mistake new users make is installing a copycat. Lookalike “DeepSeek” apps exist, and an unofficial wrapper can route your prompts through someone else’s server. Verify before you tap Install.

Verification checklist

1. Open the App Store (iOS) or Play Store (Android) and search for DeepSeek. The official listing is titled DeepSeek – AI Assistant.
2. Confirm the publisher. On the App Store the seller is Hangzhou DeepSeek Artificial Intelligence Co., Ltd (the listing’s developer line shows the company’s Chinese name, 杭州深度求索人工智能基础技术研究有限公司); on Google Play the developer is shown as DeepSeek. Anything else is a clone.
3. Cross-check by visiting DeepSeek’s official download page at deepseek.com/en/download in your mobile browser and following its “Download for iOS” or “Download for Android” buttons.
4. Read the privacy section of the listing. As of 23 October 2026, the Google Play “Data safety” section says the app may share device or other IDs with third parties, may collect location, personal info and other data types, encrypts data in transit, and lets you request deletion.

If you need a deeper walkthrough of authenticity checks, the dedicated guide on verifying the official DeepSeek app covers signature hashes and country-specific publisher names.

Step 2 — Install on iPhone or Android

iPhone (iOS)

1. Open the App Store and tap the verified DeepSeek listing.
2. Tap Get and confirm with Face ID, Touch ID, or your Apple ID password.
3. When prompted, allow notifications only if you want push alerts.
4. Open the app from your home screen.

For platform-specific tips — Siri Shortcuts, widgets, and iCloud-aware settings — see the dedicated DeepSeek on iPhone guide.

Android

1. Open the Play Store and tap the verified DeepSeek listing.
2. Tap Install.
3. If the Play Store listing is unavailable where you live, DeepSeek’s official download page links its “Download for Android” button to an APK hosted on download.deepseek.com. Never sideload from a third-party APK mirror.
4. Open the app from your launcher.

The Android-specific notes (notification channels, Share Sheet integration, foreground-service behaviour on aggressive battery managers) live in the DeepSeek on Android guide.

Step 3 — Sign in and configure your account

Tap Sign in on the welcome screen and use one of the sign-in options the app offers. Your chat history is tied to your DeepSeek account — unlike the API, which keeps no history. If you forgot your credentials, the reset DeepSeek password guide walks through the email-recovery flow.

Once signed in, open the app’s settings and look for options such as these (labels vary between app versions):

• Data controls. Check the app’s data and privacy settings, and read DeepSeek’s privacy policy for how conversations may be used, before you handle sensitive material. Our DeepSeek privacy notes cover the full picture, including data residency.
• Theme. If the app offers a theme option, pick light or dark mode.
• Language. If the app offers an interface-language option, set the one you prefer.

Step 4 — Use the chat modes, web search, and file upload

DeepSeek has renamed its chat controls between releases, so use the labels in your copy of the app. Here is what DeepSeek’s own announcements have said about each:

For long documents, note DeepSeek’s April 2026 statement that 1M-token context had become the default across all its official services; its docs do not give a separate limit for the app.

Step 5 — Verify it worked

A three-prompt smoke test confirms the install is healthy:

1. Plain chat: “What is 17 × 23?” The model should answer 391.
2. Reasoning: Switch to the app’s reasoning or expert mode, if it shows one, and ask, “Plan a 5-day trip to Lisbon for two on a $1,500 budget.” You should see a structured itinerary.
3. Web search: If the app offers a search option, turn it on and ask, “What did DeepSeek release this month?” The answer should cite web sources.

If all three work, the app is correctly authenticated and reaching DeepSeek’s servers. For deeper feature exploration, the DeepSeek features reference covers the app’s options.

Common errors and fixes

Mobile vs. web vs. API — which surface should you use?

The app and the web chat share one account; the API is a separate developer product with its own model IDs.

If you graduate from the app to the API, the setup, code samples and model choice are covered in our DeepSeek API getting started tutorial.

What the mobile app does not do

• It does not run models on-device. Every prompt is a network call. If you want fully offline use, see DeepSeek offline setup and running DeepSeek on Ollama on a laptop.
• It does not expose temperature, top_p, or max_tokens. Those are API-only controls. The app uses DeepSeek’s defaults.
• It does not let you call functions or tools. Function calling is an API feature.
• It does not give you a free API quota. Web/app are free for personal chat; the API bills separately per token — current rates are on our DeepSeek API pricing page. DeepSeek may offer a granted balance — a small promotional credit that can expire — so check the billing console for current offers rather than relying on rumours.

Next steps

• Push your phone-only chats further with structured prompts: see DeepSeek prompt engineering.
• Build a phone-friendly automation: try the DeepSeek Telegram bot or WhatsApp integration.
• Compare across alternatives in the DeepSeek vs ChatGPT head-to-head, or browse the full set of DeepSeek tutorials.