Comparison

Caverno vs HTML Viewer (013653)

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

Head to head
About

Caverno

Features
Read full description

Caverno is a powerful chat client for locally-hosted LLMs. Connect to Ollama, LM Studio, vLLM, or any OpenAI-compatible API endpoint and start chatting — no cloud required. KEY FEATURES • Any OpenAI-Compatible Server Connect to your own LLM running on localhost or your local network. Supports any endpoint that speaks the OpenAI API format. • Tool Calling (MCP Protocol) Extend your AI with real-time tools — web search, calculator, code execution, and more. Caverno uses the Model Context Protocol to let your LLM take actions. • Session Memory Your assistant remembers your preferences, constraints, and context across conversations. Memory is stored locally and fully under your control. • Voice In & Out Speak your messages and have responses read aloud. Configurable speech rate and auto-read options. • Image Attachments Attach photos from your library to include visual context in your conversations. • Multiple Conversations Create, switch, and manage separate chat threads. All conversations are persisted locally. • Assistant Modes Switch between General and Coding modes for different response styles tailored to your task. • Privacy First No account required. No data sent to third parties. All conversations and memory stay on your device — the only network connection is to the server you configure. GETTING STARTED 1. Install an OpenAI-compatible LLM server (Ollama, LM Studio, etc.) 2. Open Caverno and go to Settings 3. Enter your server URL and select a model 4. Start chatting! Caverno is designed for developers, AI enthusiasts, and anyone who wants full control over their AI assistant.

About

HTML Viewer (013653)

Features
Read full description

Every HTML file you generate with AI deserves a proper home — and a proper canvas. HTML Viewer is the studio built for the age of AI-generated code. Whether you're creating dashboards, prototypes, or data visualizations from any AI assistant or large language model, this app gives your HTML artifacts the full-fidelity rendering environment they deserve. IMPORT FROM FILES, INSTANTLY Bring in any HTML file straight from the Files app — iCloud Drive, local storage, or any connected provider. No copy-pasting, no workarounds. Tap, import, and render. ORGANIZED THE WAY YOU WORK Build a nested folder structure and manage all your HTML files in a collapsible file tree. When it's time to focus, one tap hides the entire sidebar and expands the canvas to fill your screen. TABS AND SPLIT VIEW Open multiple HTML files at once with a clean tabbed interface, or activate split view to compare two files side by side. Perfect for reviewing iterations, design variations, or before-and-after states across your projects. YOUR FILES, YOUR DEVICE Everything stays on your device. No uploads, no remote servers, no accounts required. Your files are stored privately on-device by default. HTML Viewer is the tool that was missing from every AI-assisted workflow. Download it today and give your artifacts a studio-grade home.

Screenshots

Caverno4 screens
HTML Viewer (013653)2 screens

Verdict

The call

The clearest difference is iOS requirement: HTML Viewer (013653) at 18.0 against Caverno's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference Ā· 5 level
Caverno versus HTML Viewer (013653): the parameters behind the verdict, then further details
ParameterCavernoHTML Viewer (013653)
PriceFreeFree
Update frequencyEvery 2 days—
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.018.0 — better
Further details — not scored
Size33 MB3 MB
Age rating17+17+
DeveloperOsamu NoguchiNaoya Yamashita

In-app purchases

None

Caverno

No in-app purchases

None

HTML Viewer (013653)

No in-app purchases

Questions

Is Caverno free?
Caverno is free to download, with no in-app purchases.
Is HTML Viewer (013653) free?
HTML Viewer (013653) is free to download, with no in-app purchases.
Do Caverno or HTML Viewer (013653) have ads?
Neither Caverno nor HTML Viewer (013653) shows ads.

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