How to Use DeepSeek on iPhone: A Practical 2026 Guide

If you want DeepSeek on iPhone, the short answer is: install the official “DeepSeek – AI Assistant” app from the App Store, sign in, and you are chatting with the same models as DeepSeek’s web chat — its 17 October 2026 Change Log says the official web and app models were updated to DeepSeek-V4.1-Flash-1017. The longer answer matters more, because lookalike apps with similar names exist, and the iOS experience behaves very differently from the API most developers write about. This guide walks through verified installation, account setup, the chat modes, privacy configuration, iOS Shortcuts integration, and when you should reach for the API instead of the app.

The direct answer: yes, DeepSeek runs natively on iPhone

DeepSeek ships a free official iOS app called DeepSeek – AI Assistant. On the US App Store (checked 24 October 2026) the seller is Hangzhou DeepSeek Artificial Intelligence Co., Ltd, the price is Free, and the app requires iOS 15.0 or later on iPhone (iPadOS 15.0 or later on iPad); the current version, 2.7.1, was released on 23 October 2026. On the model side, DeepSeek’s 17 October 2026 Change Log says the web and app run 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”.

Two things to understand before you install:

• The app is a client, not the model. Your prompts go to DeepSeek’s servers — its Privacy Policy (updated 10 February 2026) says it collects, processes and stores personal data in the People’s Republic of China — and responses come back. The app does not run the model on your phone: the DeepSeek-V4.1-Flash-1017 weights alone are about 510 GB on Hugging Face, which no phone can host.
• The iOS app and the developer API are different products. The app keeps your chat history with your account; the API is stateless. If you are building software, see the DeepSeek API documentation instead of this guide.

Step 1: Install the official app (and verify it is the real one)

Open the App Store and search for DeepSeek. As of 24 October 2026 the legitimate listing has these markers:

1. App name: DeepSeek – AI Assistant
2. Seller: Hangzhou DeepSeek Artificial Intelligence Co., Ltd (shown in the listing’s Information section; the 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)
3. Price: Free, with no in-app purchases listed
4. Support contact in the description: [email protected]

If a listing asks for a subscription, shows an unfamiliar seller, or bundles the name with words like “Pro”, “Plus”, or “GPT” in the title, treat it as a copycat. For a longer walkthrough, see our guide to verifying the official DeepSeek app.

Step 2: Create or sign in to your account

On first launch, sign in or create an account with one of the options the app offers. DeepSeek’s Terms of Use (updated 27 March 2026) say you register with your email or a third-party account; its Privacy Policy lists an email address and/or telephone number for accounts and mentions signing in through a third-party service “such as Apple or Google” where available.

If the app offers Sign in with Apple and you use it, Apple’s Hide My Email option can relay your address so DeepSeek does not receive your real one. For a broader walkthrough of the onboarding flow, see our DeepSeek account setup guide. If you hit a password reset loop, the reset DeepSeek password guide covers the common causes.

Step 3: Pick the right mode for the task

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 and terms have said about each:

Reasoning answers take longer than plain ones, and searching the web adds network time, so leave both off for quick questions. On the API, thinking is a request parameter rather than a separate model, and it returns reasoning_content alongside the final content.

Step 4: Configure privacy before you type anything sensitive

DeepSeek’s Privacy Policy (10 February 2026) says personal data is collected, processed and stored in the People’s Republic of China, and its Terms of Use (27 March 2026) say de-identified inputs and outputs may be used to improve the service unless you opt out. That has material consequences for users in regulated industries. For a deeper breakdown, see our DeepSeek privacy explainer.

At minimum, do the following in the app’s settings (exact wording varies by app version):

• Turn off Improve the model for everyone — the opt-out the Terms of Use name.
• Manage your chat history: the Privacy Policy says you can copy or delete it via your settings. Deleting it removes your own record too.
• Review the microphone and photo permissions iOS granted — revoke them in iOS Settings → DeepSeek if you do not use voice or image input.

Italy’s Garante ordered an urgent limitation on DeepSeek’s processing of Italian users’ data in January 2025, and individual US states including Texas, New York and Virginia have restricted it on government devices. If you work for a regulated employer, check your organisation’s acceptable-use policy before signing in; for a country-by-country summary, see DeepSeek availability by country.

Step 5: Wire DeepSeek into iOS Shortcuts (optional but powerful)

DeepSeek’s documentation does not describe a native Shortcuts action for the app, but you can build your own using the POST /chat/completions endpoint — the OpenAI-compatible chat endpoint DeepSeek runs at https://api.deepseek.com. Give the shortcut a name and Siri can run it by voice, which turns a spoken request into an API call.

You will need a DeepSeek API key; the API key setup guide covers that. Then in Shortcuts, add a Get Contents of URL action configured like this:

URL:     https://api.deepseek.com/chat/completions
Method:  POST
Headers:
  Authorization: Bearer YOUR_API_KEY
  Content-Type:  application/json
Body (JSON):
{
  "model": "deepseek-flash",
  "messages": [
    {"role": "user", "content": "ShortcutInput"}
  ],
  "thinking": {"type": "disabled"},
  "temperature": 1.3,
  "max_tokens": 1024
}

A few notes specific to iOS Shortcuts:

• Use deepseek-flash for chat-style prompts — deepseek-v4-pro costs 3.3 times as much on output and 4.4 times as much on cache-miss input.
• The body above turns thinking off for faster spoken replies; temperature only takes effect in non-thinking mode, and 1.3 is DeepSeek’s suggested value for general conversation. For harder questions, remove the thinking line (thinking is on by default) and add "reasoning_effort": "high", accepting the extra latency. The response will then contain reasoning_content alongside the final content; parse whichever field you want to speak back.
• Shortcuts has no chat memory. The API is stateless, so each Siri invocation is a fresh conversation unless you persist and resend history yourself.

For a full walkthrough of the API basics including streaming and tool calling, the DeepSeek API getting started tutorial is the next stop.

What the iPhone app can and cannot do

What works well

• Voice dictation — iOS’s built-in microphone key in the keyboard works in any text field, so you do not need a separate speech-to-text app. DeepSeek’s Privacy Policy also lists voice input among the content it may collect.
• Images and files — the Privacy Policy lists uploaded files and photos among user inputs, and the App Store privacy label lists photos or videos under user content.
• Long documents — when DeepSeek launched the April 2026 V4 preview, it said 1M-token context had become the default across all its official services; its docs do not give a separate file-size limit for the app.
• Chat history — the Privacy Policy says you can manage your chat history and copy or delete it via your settings, and that DeepSeek uses device and user IDs to identify your activity when you log in from multiple devices, such as the web version and the Android app.

What does not work on iPhone

• Running the model locally. The current DeepSeek-V4.1-Flash-1017 weights are about 510 GB. No iPhone can host them. If you want offline inference, look at a distilled R1 model via an iOS-compatible runtime — see DeepSeek offline setup.
• Custom system prompts. DeepSeek documents system messages for the API, not as an app setting. For persona control, use the API or a third-party client.
• Tool calling and JSON mode. These are API-only features.

App vs browser vs API on iPhone

Three ways to reach DeepSeek from an iPhone, each with trade-offs:

For context on when the app falls short, the browser vs app comparison lays out specifics.

Cost if you move to the API from your iPhone

The app is free. Moving to the API — say, through a Shortcut or a third-party iOS client — means you pay per token. Here is a worked example for a personal Siri-plus-DeepSeek setup on deepseek-flash with thinking off, as in the shortcut above, at the prices listed on DeepSeek’s pricing page as of October 2026 (peak hours are 01:00–04:00 and 06:00–10:00 UTC, Monday to Friday, excluding Chinese public holidays; everything else is off-peak at half price).

Assume 500 voice-triggered queries per month, each a 150-token prompt and a 400-token answer, with no cached prefix:

• Uncached input: 150 × 500 = 75,000 tokens × $0.30/M = $0.0225 at peak; × $0.15/M = $0.01125 off-peak
• Cache hit input: 0 tokens × $0.006/M (peak) or $0.003/M (off-peak) = $0.00
• Output: 400 × 500 = 200,000 tokens × $1.20/M = $0.24 at peak; × $0.60/M = $0.12 off-peak
• Total: about $0.26 per month if every query runs at peak ($0.2625); about $0.13 if all run off-peak ($0.13125)

At those volumes the API costs well under a dollar a month. If you push the same workload onto deepseek-v4-pro ($1.32/M cache-miss input and $3.96/M output at peak, $0.66 / $1.98 off-peak), it costs about $0.89 per month at peak ($0.099 + $0.792 = $0.891) or about $0.45 off-peak ($0.0495 + $0.396 = $0.4455). For larger workloads, see the DeepSeek API pricing page and our pricing calculator.

Troubleshooting the most common iPhone issues

For anything the table does not cover, the DeepSeek troubleshooting guide is more exhaustive.

Verdict: who should install DeepSeek on iPhone

Install it if you want a free chatbot for drafting, coding snippets, maths homework, and general Q&A, and you are comfortable with a service that stores data in China. DeepSeek does not publicly document a daily message cap for the free app. Skip it if your employer or jurisdiction restricts Chinese AI services, or if you need tool calling or system prompts — those belong on the API. If you are evaluating against other assistants first, start with DeepSeek vs ChatGPT.