DDchat AI vs OrangeWrite
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
OrangeWrite
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OrangeWrite is an AI writing system built specifically for fiction writers. It is not just another chat box where you paste prompts and hope the next answer still remembers your story. Start with a single spark. OrangeWrite guides you through a conversational story setup process, helping define the genre, protagonist, opening situation, conflict, world rules, writing style, and first-stage direction. Once the story is ready to write, it creates a clear project profile and takes you directly into chapter writing instead of leaving you with an empty draft. At the heart of OrangeWrite is persistent story memory. The AI keeps working around the same book, preserving your worldbuilding, character relationships, chapter progress, open promises, established facts, and creative direction, so every new chapter does not have to start from zero. Key features: Guided story setup: Begin with one idea and let AI ask the right questions to fill the missing pieces Long-term story memory: Preserve characters, world rules, plotlines, promises, and chapter state Book profile: Review the title, story hook, protagonist opening, central pressure, and early direction before writing Chapter writing: Enter the writing page with a chapter title, writing goal, and draft already prepared AI collaboration panel: Ask, adjust, rewrite, and continue within the context of the current book Layered quality checks: Review chapters against goals, story rhythm, continuity, and consistency Chapter progression flow: Save the current chapter, plan the next one, generate a draft, and update story memory Project bookshelf: Manage existing works and continue stories that are still in setup or already in writing TXT export: Export book information, table of contents, and manuscript text for submission workflows OrangeWrite is for writers building novels, serial fiction, web fiction, light novels, short stories, or early story prototypes. It focuses on more than generating a piece of text. It helps turn an idea into a fiction project that can keep moving, remember its own context, and stay aligned as the story grows.
Screenshots
Verdict
The clearest difference is in-app purchases: OrangeWrite at none against DDchat AI's 2. OrangeWrite also leads on device support (4 vs 2) and iOS requirement (13.0 vs 26.0). DDchat AI's advantage is update cadence (every 3 days vs every 3 weeks). On price and ads 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
Both are free to download. DDchat AI sells 2 one-off in-app purchases. OrangeWrite asks for nothing beyond the download.
DDchat AI ships an update every 3 days, OrangeWrite every 3 weeks. The most recent releases landed on October 21, 2026 and October 5, 2026 respectively.
| Parameter | DDchat AI | OrangeWrite |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 87.5% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 26.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | 俊华 乔 | 北京智卓凯科技有限公司 |
In-app purchases
DDchat AI
- DDchat Pro Lifetime (Offer)$1.99
- DDchat Pro Lifetime$9.99
OrangeWrite
No in-app purchases









