Direct API access
Use OpenAI-Compatible APIs on iPhone and Mac
Connect built-in providers, gateways, local servers, and other OpenAI-compatible APIs.
Read the guideCumbersome feature guides
Direct APIs, local tools, and better control over AI
Cumbersome is a native LLM API client for iPhone, iPad, and Mac. These short guides show how its less obvious features work, what data leaves your device, and where the limits are.
On-device tools
Let AI Search and Open Web Pages on Your Device
Search, open pages, and inspect the tool trail instead of relying on opaque provider search.
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On-device tools
Analyze CSV Files with AI on iPhone and Mac
Run Python on attached CSV, TSV, JSON, and text files, then display calculated tables and charts.
Read the guide
Conversation control
Annotate AI Responses Without Rewriting the Prompt
Attach a correction or instruction to the exact passage it belongs to and keep it in context.
Read the guide
Multiple-model answers
Compare Three AI Answers with Face/Off Mode
Read the guide
Multiple-model answers
Combine Multiple AI Answers with Mind/Meld
Ask three independent AI tracks for answers and synthesize the strongest ideas when a prompt needs it.
Read the guideTry the features in Cumbersome
The app is free. You use your own provider accounts and pay those providers directly for the API calls you make.