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Cumbersome: AI LLM API Client

Cumbersome: AI LLM API Client

API to ChatGPT, OpenAI, Ollama

99 ratings
32 reviews
📊 Productivity
🛠️ Developer Tools
Free
In-App Purchases

Details

Released
October 1, 2025
Updated
October 23, 2026

Features

Developer

Folding Sky Co
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Cumbersome: AI LLM API Client screenshot #1 for iPhone
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Cumbersome: AI LLM API Client screenshot #9 for iPhone
Cumbersome: AI LLM API Client screenshot #10 for iPhone
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About

Connect directly to AI provider APIs for greater control over model selection and parameters. Compare different AI models, pay per use, and customize responses with advanced features. Supports multiple providers and custom endpoints.

✓Direct API connections
✓Multi-provider support
✓Full parameter control
✓Face/Off Mode with AI judge
✓Concurrent chats
✓Edit messages
✓Rich content support
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What's New in Cumbersome

2.0.0

October 23, 2026

feat(pcc): enable Apple Private Cloud Compute chats with local tools

2

Subscriptions & In-App Purchases

Cumbersome Pro Annual

Pro tools for Projects, including conversation search.

$39.991 Year
How to cancel Cumbersome subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Marvelous app

Such a great way to use my favorite LLMs.
JJJ_indo

4 to 5 stars

Thanks for adding docs!
MMJ_SFS

Response from developer

You are welcome! 😁

THE BEST

这是我在app store见过的最好的api client，美观，完全免费，功能齐全，方便实用。
给个建议：1 UI方面还需要改进，主要在文本框有些有奇怪的bug
Yyiyan6

THE BEST！

The app almost has every feature you’d expect. It’s highly customizable and runs like butter. Can’t believe the developer stuffed so many functions in while making it this small in size. And the design language aligns with Apple perfectly. Definitely a must-have if you want to use your own api keys
KKamikazzzzzzzz

Response from developer

"Runs like butter"... love your turn of phrase! Thanks very much for your review 😃🧈

Perfect for local AI

I tried several apps before I found this to connect to a model I host on my own hardware. I almost thought I would have to build it myself. This is exactly what I wanted to build!
MBMatt Always Building

Response from developer

Glad you like the app. And thanks so much for your review!

See 27 more reviews

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FAQ

Does Cumbersome require API keys?

Yes, Cumbersome requires you to bring your own API keys from providers like OpenAI, Anthropic, Google AI Studio, or use an OpenAI-compatible endpoint. You pay the providers directly for API access.

How does Cumbersome compare to subscription AI apps?

Cumbersome offers direct API access, allowing you to choose specific models and pay per use, unlike subscription apps that may route requests to cheaper models and hide technical controls.

What AI providers does Cumbersome support?

Cumbersome supports ChatGPT/OpenAI, Claude/Anthropic, Gemini/Google AI Studio, OpenRouter, Vercel AI Gateway, Z.ai, and OpenAI-compatible custom endpoints like Ollama and Azure.

Can I compare different AI models with Cumbersome?

Yes, Cumbersome allows you to switch providers or AI models mid-conversation and compare different models on the same prompt, giving you direct insight into their performance.

What are the advanced features in Cumbersome?

Features include Face/Off Mode (AI judge picks the best of three responses), extended thinking for model reasoning, full parameter control (temperature, tokens), concurrent chats, and message editing.

Is Cumbersome available on multiple devices?

Yes, Cumbersome is natively available on iPhone, iPad, and Mac, with iCloud sync across devices. Nothing is saved to their servers.

How often is Cumbersome updated?

The latest version is 1.39.0, last updated on March 19, 2026. This indicates a relatively active development cycle for the application.

What is the age rating for Cumbersome?

Cumbersome has an age rating of 17+, suggesting it is intended for mature users due to the nature of AI interactions and potential content.