Comparison

DDchat AI vs OWrite Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DDchat AI

A native iOS AI chat client offering a polished and fluid user experience. It supports multiple AI models and protocols, with advanced features like visualized chain-of-thought and task-specific assistants. All data remains on your device for enhanced privacy.

Highlights
  • Native iOS feel with fluid animations
  • Supports Chat Completions and Anthropic protocols
  • Automatic model capability detection
  • Visualized chain-of-thought reasoning
  • Task-specific AI assistants
  • Inline HTML rendering with Markdown support
  • Privacy-first, zero data upload
Features
Read full description

DDchat AI is a polished, minimalist native iOS AI client with web search, multimodal understanding, and HTML rendering. Connect your own APIs to use different providers and models in one flexible, fluid app. — BEAUTIFUL BY DESIGN — From rounded bubbles to smooth streaming animations, from live scrolling reasoning previews to syntax-highlighted code blocks, every pixel is polished. Full Light and Dark Mode support, liquid glass, and gradient accents create a truly native experience. — OFFICIAL APIs AND THIRD-PARTY GATEWAYS — One app to connect with advanced AI models from around the world. Use DeepSeek, Kimi, MiniMax, Zhipu, MiMo, Qwen, and more. Connect to official providers or compatible third-party gateways, choose your provider, and switch models to suit each task. — AUTOMATIC MODEL CAPABILITY DETECTION — A built-in capability database detects whether a model supports advanced reasoning, vision, tool calling, and more, then applies the appropriate parameters. The database updates silently from the cloud, helping new models work without an app update. — HTML RENDERING ENGINE — HTML tags in AI replies can be rendered directly in the conversation, making cards, tables, lists, and other rich content easier to read. Built-in Markdown parsing and syntax highlighting for 10+ languages, including Python, Swift, Go, and Rust, keep code and quotes clear as well. — MATH AND DIAGRAM RENDERING — Render LaTeX equations and Mermaid diagrams right in your conversations, from formulas to flowcharts and sequence diagrams. Zoom in on diagrams and save them as images for study, organization, or sharing. — WEB SEARCH WITH SOURCES — Use built-in model search or connect a range of independent search services. Models can search and browse the web based on your question, with citations and sources shown directly in the answer so important information is easy to verify. — MULTIMODAL IMAGE UNDERSTANDING — Take a photo or select multiple images from your library and chat directly with vision-capable models. Analyze screenshots, understand scenes, or read text from images with ease. — VISUALIZED REASONING — See a model's reasoning as it is generated, then expand it for more detail. When supported, choose different reasoning levels to balance response speed and depth. — TASK-SPECIFIC ASSISTANTS — Create dedicated AI assistants for different scenarios, such as translation, coding, writing, or research. Each assistant has its own system prompt, sampling parameters, context length, and default model. — ASSISTANT CREATION AND OPTIMIZATION TOOLS — Describe what you need in one sentence, and AI can create a new assistant for you. If the results are not quite right, use another request to refine its prompts and related settings so it works the way you want. — PRIVACY-FIRST, STORED LOCALLY — API keys, chats, and assistant settings are stored locally on your device. Requests go directly to the AI provider you choose, without passing through a DDchat intermediary server. No analytics, no ads, no tracking. — MORE HIGHLIGHTS — - Multi-conversation history grouped by assistant - Fetch model lists online or add models manually - Duplicate, import, and share assistants - Keep streaming replies running in the background and generate with multiple assistants at once Getting started: 1. Add an API provider in Settings, either an official endpoint or a compatible gateway 2. Create an AI assistant and configure its prompt and parameters 3. Choose a model and start chatting Note: This app requires you to provide your own API keys. It does not include or provide any AI service. — CONTACT — For feedback or questions, please email: ddchatsupport@gmail.com

About

OWrite Pro

This app integrates notes, tasks, habit tracking, mindful focus sessions, and important date reminders into a single, organized platform. Capture ideas, break down goals, build consistent habits, and stay focused on what matters most.

Highlights
  • Integrated notes with rich text formatting and photo support
  • Habit tracking with daily streaks or cumulative targets
  • Task management with subtasks and progress tracking
  • Mindful focus timer with cumulative hour goals and statistics
  • Important date tracking with countdowns and widgets
  • Flexible reminder system with various scheduling options
  • Home screen for an overview of daily activities
Features
Read full description

OWrite Pro brings notes, plans, habits, focus, outdoor workouts, reminders, and important dates into one calm personal space. Write down what matters, take the next small step, and make room to move. WRITE DOWN IDEAS WORTH KEEPING Use rich-text notes for journals, plans, excerpts, drafts, or unnamed thoughts. Add photos, style your text, search your content, restore deleted items from Trash, and turn a note into an image to save or share. BUILD HABITS AT YOUR OWN PACE Choose daily streaks or cumulative targets for reading, stretching, exercise, and more. Set dates, colors, icons, and reminders. Check in with one tap and review progress on the calendar. BREAK GOALS INTO SMALL STEPS Create tasks for long-term plans or everyday work. Set deadlines, reminders, tags, and colors. Divide a goal into scheduled subtasks with checklists and notes, then review progress in week, month, and timeline views. GO OUTSIDE AND MOVE Record outdoor runs, walks, hikes, and rides. Follow your route and live duration, distance, pace or speed, and calories. Pause or resume, mark splits, revisit workout details, and explore distance trends. Supported devices can show an active workout with Live Activities on the Lock Screen and Dynamic Island. Routes need Location permission; Health data requires authorization, and heart-rate readings depend on a compatible device such as Apple Watch. FOCUS WITH INTENTION Create a focus goal and record sessions with an immersive timer. Review daily, weekly, monthly, and yearly statistics. Follow a running timer through Live Activities on supported devices. As a goal nears completion, the timer becomes a countdown and your effort blooms into a mathematical flower. KEEP IMPORTANT DATES IN SIGHT Save birthdays, trips, anniversaries, launches, and other days worth anticipating. See countdowns and elapsed days, choose reminders and recurrence, add a photo or Live Photo, and display a selected date in the Home Screen widget. REMINDERS THAT FIT YOUR DAY Create one-time reminders or repeat them on selected weekdays, monthly, or yearly. Add notes and images, then manage reminders in one dedicated center. ONE HOME FOR YOUR LIFE See habits, tasks, recent notes, focus goals, workouts, and important dates together. Search titles, content, and tags or filter by color. Completing habit, task, and focus goals unlocks distinctive Maurer Rose achievements. DESIGNED FOR YOU OWrite supports VoiceOver, Voice Control, accessible actions and widgets, Reduced Motion, enhanced contrast, appearance choices, and 12- or 24-hour time. Data stays on your device by default, with optional iCloud sync. Protect app content with Face ID or the device passcode. OWrite Pro offers an optional lifetime purchase and auto-renewable monthly or annual subscriptions. Upgrading unlocks all Pro features. Actual prices appear on the in-app purchase screen and App Store confirmation sheet. Manage or cancel subscriptions in Apple Account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://github.com/HuangRobin/OWrite/blob/master/OWrite%20Terms%20of%20Service%20and%20Privacy%20Policy

Screenshots

DDchat AI4 screens
OWrite Pro4 screens

Verdict

The call

The clearest difference is monetization model: OWrite Pro at free with in-app purchases against DDchat AI's paid. OWrite Pro also leads on iOS requirement (18.0 vs 26.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. DDchat AI sells 2 one-off in-app purchases and OWrite Pro sells 6 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for DDchat AI against 5.0 for OWrite Pro. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews are what separate them: 94% of DDchat AI's written reviews are positive against 100% of OWrite Pro's.

UpkeepUpdate frequency

DDchat AI ships an update every 3 days, OWrite Pro every 5 days. Both last shipped on October 31, 2026.

Scorecard2 real differences · 8 level
DDchat AI versus OWrite Pro: the parameters behind the verdict, then further details
ParameterDDchat AIOWrite Pro
PriceFreeFree
Rating5.0 (5 ratings)5.0 (4 ratings)
Positive reviews93.5% of reviews100.0% of reviews — better
Number of ratings5 — better4
Update frequencyEvery 3 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS26.018.0 — better
Further details — not scored
Size15 MB21 MB
Age rating4+4+
Developer俊华 乔琳钧 黄

Customer experience

DDchat AI

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews31 reviews
Positive93.5%
Neutral3.2%
Negative3.2%

OWrite Pro

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews14 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

DDchat AI

One-time2
  • DDchat Pro Lifetime (Offer)$1.99
  • DDchat Pro Lifetime$9.99
6 purchases

OWrite Pro

Subscriptions4
  • OWrite Pro Monthly1 Month trial$0.991 Month
  • OWrite Pro Monthly1 Month trial$1.991 Month
  • OWrite Pro Annual1 Month trial$9.991 Year
Show 1 more
  • OWrite Pro Annual1 Month trial$19.991 Year
One-time2
  • OWrite Pro Lifetime$12.99
  • OWrite Pro Lifetime$24.99

Questions

Is DDchat AI free?
DDchat AI is free to download, with in-app purchases available.
Is OWrite Pro free?
OWrite Pro is free to download, with in-app purchases available.
Which has better reviews, DDchat AI or OWrite Pro?
DDchat AI and OWrite Pro are both rated 5.0 out of 5 on the App Store, from 5 and 4 ratings respectively.
Do DDchat AI or OWrite Pro have ads?
Neither DDchat AI nor OWrite Pro shows ads.
Which is updated more often, DDchat AI or OWrite Pro?
DDchat AI ships an update every 3 days, and OWrite Pro every 5 days. Most recently, DDchat AI was updated on October 31, 2026 and OWrite Pro on October 31, 2026.

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