250+ iOS apps curated and reviewed
The best api keys apps on iPhone average 4.6★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.9★ (52) | No | No | Aug 2026 |
| 2 |  | Free | — | No | No | Aug 2026 |
| 3 |  | Free | 4.7★ (553) | No | Yes | Aug 2026 |
| 4 |  | Free | — | No | Yes | Jun 2026 |
| 5 |  | Free | — | No | Yes | Aug 2026 |
| 6 |  | Free | 4.0★ (4) | No | No | Jun 2026 |
| 7 |  | Free | 4.5★ (1.3K) | No | Yes | Aug 2026 |
| 8 |  | Free | 4.3★ (6) | Yes | Yes | Aug 2026 |
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.
Test various APIs directly from your mobile device. Supports REST, GraphQL, WebSockets, and more, with advanced editors and request customization. Share requests easily and manage cookies and history.
An open-source authentication system offering cloud-hosted subscription plans. It provides client SDKs for multiple programming languages, facilitating integration into various applications. Connect with the community via Telegram or explore the code on GitHub.
This app allows users to send HTTP/HTTPS requests and connect to WebSockets, making it easy to debug APIs on the go. It supports various response formats, collaboration features, and authentication methods, streamlining API development and testing.
This tool allows users to send and analyze API requests with customizable parameters, authorization, and body content. It offers robust search and filtering capabilities for managing saved requests, optimized for iPadOS with keyboard support.
Access powerful AI models locally or through cloud APIs. This tool offers flexible integration with GPT-4, OpenAI, Grok, and local LLMs for diverse tasks like coding, drafting, and research.
This app acts as a universal AI chat client, supporting a wide range of models and features like image input, image generation, and offline capabilities. It offers a private and secure experience with no data collection and no ads.
This application simplifies understanding of APIs by allowing users to interact with core components. It introduces fundamental API concepts and basic terminology in an accessible way.
This native client allows developers to send and test REST and GraphQL requests on iPhone and iPad. It features an AI assistant for generating code, documentation, and mock data, along with robust debugging and media preview capabilities.
This tool empowers mobile developers to build and test APIs directly on their devices. It leverages on-device machine learning to analyze API results and identify patterns, while also allowing for the creation and management of various request types and data formats.
