Comparison

DDchat AI vs Note Taking App

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

Note Taking App

Features
Read full description

Turn every thought into a page worth keeping. Digital Notes is a private, beautifully designed notebook for handwriting, typing, planning, studying, and annotating documents. Write naturally with Apple Pencil or your finger, or add typed text that flows across multiple pages. CREATE YOUR WAY • Draw with pen, pencil, marker, eraser, and lasso • Choose ruled, dotted, grid, or plain paper • Customize notebook covers, folders, tags, and favorites • Turn typed text into handwritten-style pages WORK WITH DOCUMENTS • Import PDFs and annotate every page • Scan documents or add photos • Export notebooks as PDFs or pages as images • Extract searchable text using on-device recognition KEEP IDEAS ORGANIZED • Search titles, text, tags, and transcripts • Archive, duplicate, restore, and manage notebooks • Turn your notes into study cards • Attach audio recordings to notebooks • Fold meaningful pages into your keepsake jar PRIVATE BY DESIGN Your notebooks, drawings, scans, and recordings stay on your device. Digital Notes requires no account and includes local backup and restore tools for keeping an additional copy. Whether you’re capturing a quick idea, taking lecture notes, planning your week, journaling, or annotating a PDF, Digital Notes gives every thought a calm place to grow. Privacy Policy: https://digitalhole.github.io/DHPrivacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

DDchat AI4 screens
Note Taking App4 screens

Verdict

The call

The clearest difference is in-app purchases: Note Taking App at none against DDchat AI's 2. Note Taking App also leads on iOS requirement (17.0 vs 26.0). DDchat AI's advantage is ads (none vs shown). On price, update cadence and device support 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. Note Taking App asks for nothing beyond the download.

UpkeepUpdate frequency

DDchat AI ships an update every 3 days, Note Taking App every 2 days. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
DDchat AI versus Note Taking App: the parameters behind the verdict, then further details
ParameterDDchat AINote Taking App
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews87.5% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 daysEvery 2 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017.0 — better
Further details — not scored
Size12 MB15 MB
Age rating4+4+
Developer俊华 乔Arima Jain

In-app purchases

2 purchases

DDchat AI

One-time2
  • DDchat Pro Lifetime (Offer)$1.99
  • DDchat Pro Lifetime$9.99
None

Note Taking App

No in-app purchases

Questions

Is DDchat AI free?
DDchat AI is free to download, with in-app purchases available.
Is Note Taking App free?
Note Taking App is free to download, with no in-app purchases.
Do DDchat AI or Note Taking App have ads?
Note Taking App shows ads; DDchat AI does not.
Which is updated more often, DDchat AI or Note Taking App?
DDchat AI ships an update every 3 days, and Note Taking App every 2 days. Most recently, DDchat AI was updated on October 17, 2026 and Note Taking App on October 15, 2026.

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