ApiClientSync vs Sidecar ML
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ApiClientSync
A native API client for developers to build, organize, test, and debug HTTP and WebSocket requests. It offers a clean interface for managing projects, environments, and APIs across iPhone, iPad, and Mac.
- Organize requests with collections
- Powerful request composer for HTTP/WebSocket
- Advanced response and transcript viewers
- Per-request and per-collection proxy support
- iCloud sync across devices
- Export requests as code in 20+ languages
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App Store Description — ApiClientSync ApiClientSync is a fast, fully native API client for developers who want powerful tools without unnecessary complexity. Build, organize, test, and debug HTTP and WebSocket requests in a clean interface designed for iPhone, iPad, and Mac. ORGANIZE REQUESTS WITH COLLECTIONS - Create collections for different projects, environments, or APIs - Add default headers that automatically apply to every request - Use the built-in Cookie Jar to capture, store, and send cookies across requests - Restore your last selected request and response automatically when reopening a collection POWERFUL REQUEST COMPOSER - Support for GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS - Build HTTP and WebSocket requests in one app - Edit headers and query parameters using YAML, JSON, or key-value rows - Switch formats anytime without losing data - Send JSON, XML, plain text, SPARQL, URL-encoded forms, multipart forms, and raw file bodies - Toggle multipart fields between text and file uploads per row - Import requests directly from curl commands - Export requests as ready-to-use code in 20+ languages including Swift, Python, JavaScript, Go, Rust, and more ADVANCED RESPONSE AND TRANSCRIPT VIEWERS - Adaptive response layout that maximizes workspace automatically - Pretty-print JSON and XML responses - Preview HTML, images, raw text, Base64, and binary hex dumps inline - Inspect response history for previous runs - View detailed request traces and URLSession debug logs - Review WebSocket transcripts and recent session history - Share response bodies as files or copy formatted output instantly NETWORKING, PROXY, AND IMPORT/EXPORT FEATURES - Per-request and per-collection proxy support - HTTP, HTTPS, and SOCKS5 proxy support - Username and password authentication for proxies - Disable SSL verification for testing internal or self-signed APIs - Import and export HAR 1.2 files - Preserve app-specific request backup data alongside standard HAR compatibility ICLOUD AND APPLE PLATFORM FEATURES - Sync collections, requests, and preferences across devices with iCloud - Live Activities support on iPhone for long-running requests - Home Screen widget support for monitoring saved requests - Fully native SwiftUI experience built for Apple platforms - Optimized for iPhone, iPad, and Mac with sidebar navigation and system appearance support FREE TO START, PRO TO GO FURTHER Upgrade to API Client Pro for unlimited collections, unlimited requests per collection, and HAR file import. Choose a yearly subscription or a one-time lifetime purchase. - Pro Yearly — Unlimited access, billed annually - Pro Lifetime — One-time purchase, yours forever PRIVACY FIRST - No accounts required - No tracking - No ads - Your data stays on your devices and in your iCloud - Just a fast, native API client built for developers Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Sidecar ML
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Turn your iPhone into a private, on-device AI server for your whole network. Sidecar ML runs a lightweight HTTP server on your iPhone that exposes Apple's built-in machine-learning models to any device on your local network. Tap Start Server, scan the QR code, and your Mac, PC, Raspberry Pi, or browser can call powerful on-device AI over plain REST — no cloud, no accounts, no API keys, no usage fees, and no data leaving your network. Everything runs on the phone. Nothing is uploaded to a server and there's nothing to pay for. (The one exception, music recognition, matches against Apple's catalog and tells you so up front.) ONE IPHONE, A DOZEN AI CAPABILITIES • Chat with the on-device large language model through a chat-completions endpoint that's compatible with the popular OpenAI API format — streaming, JSON mode, and structured output included. Point existing tools and SDKs at your phone and they just work. • Generate images from a text prompt in a choice of art styles. • OCR — pull text out of photos, receipts, and screenshots with per-line boxes and multi-language support. • Read barcodes and QR codes (EAN, Code128, and more). • Classify images across roughly a thousand categories, or produce image embeddings for similarity search. • Remove backgrounds and isolate subjects or people as clean PNG cut-outs. • Detect faces and facial landmarks, body pose, and hand pose. • Scan documents with automatic edge detection and perspective correction. • Convert speech to text and text to speech, with a wide range of voices (including Personal Voice). • Translate text between languages completely offline. • Analyse text: language, sentiment, named entities, tokens, and embeddings. • Classify sounds across hundreds of categories, or identify the music that's playing. BUILT FOR DEVELOPERS AND MAKERS • Clean REST + Server-Sent Events API — call it from curl, Python, JavaScript, or any HTTP client. • Chat endpoint compatible with the OpenAI format, so many existing tools and SDKs work unchanged. • Automatic discovery on your network via Bonjour. • Honest capability reporting: ask the server what it can do and it tells you exactly what's available on your device, and why. • Optional bearer-token authentication to lock the server down on shared networks. FREE WEB CONSOLE AND CODE EXAMPLES A ready-to-use web console — plus Python examples, a command-line client, and full API documentation — is free and open-source. Download the single-file console and browse the source here: https://github.com/AndersFB/Sidecar-ML-Console/ Open the console in any browser, enter your phone's address, and try every capability with a friendly UI — nothing to install. GOOD TO KNOW • The on-device large language model and image generation require an Apple Intelligence-capable iPhone. The other capabilities run on a much wider range of devices. • The server runs while the app is in the foreground; a keep-awake option helps during longer sessions. • Some features (offline translation language pairs and certain speech models) download their models on first use. Turn the iPhone in your pocket into a private AI endpoint for your projects, your home lab, and your prototypes — Sidecar ML.
Screenshots
Verdict
The clearest difference is in-app purchases: Sidecar ML at none against ApiClientSync's 2. ApiClientSync's advantage is update cadence (every 4 days vs monthly) and device support (3 vs 1). On price and ads 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
Both are free to download. ApiClientSync sells 2 in-app purchases, starting at $9.99 per year. Sidecar ML asks for nothing beyond the download.
ApiClientSync ships an update every 4 days, Sidecar ML monthly. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.
| Parameter | ApiClientSync | Sidecar ML |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 days — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, Mac — better | iPhone |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 11 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Muhammad Muaaz | Anders Fog Bunzel |
In-app purchases
ApiClientSync
- Yearly$9.991 Year
- ApiClient Pro — Lifetime$19.99
Sidecar ML
No in-app purchases









