Comparison

HTTrail vs Sidecar ML

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

Head to head
About

HTTrail

Features
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HTTrail is a native network inspection workbench for developers building and testing apps on iPhone, iPad, and Mac. Capture and decrypt the HTTPS traffic from your own device, inspect every request and response down to the byte, then compose and replay requests with a full-featured API client. Everything runs on-device. No account, no backend, no analytics, no ads β€” your traffic never leaves your device. INTERCEPTING PROXY β€’ Decrypt HTTPS with an on-device certificate authority that mints per-host certificates on the fly β€’ Inspect headers, bodies, timing, and raw hex for every flow β€’ Block, redirect (map local / map remote), rewrite requests and responses, throttle, and set breakpoints β€’ SSL-proxying allowlist so pinned apps keep working β€’ Export captures as HAR API CLIENT β€’ Compose GET, POST and more with params, headers, auth, and structured bodies (JSON, form-urlencoded, multipart) β€’ GraphQL, pre-request and test scripts, and live response preview β€’ Organize requests into collections with environments and history β€’ Import from cURL, OpenAPI 3, and Postman v2.1 β€’ Generate code: cURL, Swift, JavaScript, Python REALTIME β€’ Connect and test WebSocket, Server-Sent Events, Socket.IO, and MQTT β€’ Built-in local test server PRIVATE BY DESIGN HTTrail captures only your own device's traffic, with your explicit consent, and keeps it on your device. No data is collected. Nothing is ever sent to us. HTTrail is a developer tool for debugging and testing your own apps and APIs.

About

Sidecar ML

Features
Read full description

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 β€” 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 β€’ Chat with the on-device large language model through a chat-completions endpoint that's compatible with the popular OpenAI API format β€” streaming, JSON mode, and structured output included. Point existing tools and SDKs at your phone and they just work. β€’ Generate images from a text prompt in a choice of art styles. β€’ OCR β€” pull text out of photos, receipts, and screenshots with per-line boxes and multi-language support. β€’ Read barcodes and QR codes (EAN, Code128, and more). β€’ Classify images across roughly a thousand categories, or produce image embeddings for similarity search. β€’ Remove backgrounds and isolate subjects or people as clean PNG cut-outs. β€’ Detect faces and facial landmarks, body pose, and hand pose. β€’ Scan documents with automatic edge detection and perspective correction. β€’ Convert speech to text and text to speech, with a wide range of voices (including Personal Voice). β€’ Translate text between languages completely offline. β€’ Analyse text: language, sentiment, named entities, tokens, and embeddings. β€’ Classify sounds across hundreds of categories, or identify the music that's playing. BUILT FOR DEVELOPERS AND MAKERS β€’ Clean REST + Server-Sent Events API β€” call it from curl, Python, JavaScript, or any HTTP client. β€’ Chat endpoint compatible with the OpenAI format, so many existing tools and SDKs work unchanged. β€’ Automatic discovery on your network via Bonjour. β€’ Honest capability reporting: ask the server what it can do and it tells you exactly what's available on your device, and why. β€’ Optional bearer-token authentication to lock the server down on shared networks. FREE WEB CONSOLE AND CODE EXAMPLES A ready-to-use web console β€” plus Python examples, a command-line client, and full API documentation β€” 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 β€” nothing to install. GOOD TO KNOW β€’ 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. β€’ The server runs while the app is in the foreground; a keep-awake option helps during longer sessions. β€’ 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 β€” Sidecar ML.

Screenshots

HTTrail4 screens
Sidecar ML4 screens

Verdict

The call

The clearest difference is device support: HTTrail at 3 against Sidecar ML's 1. HTTrail also leads on iOS requirement (17.0 vs 26.0). On price, ads and in-app purchases there is nothing between them.

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

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

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

Scorecard2 real differences Β· 4 level
HTTrail versus Sidecar ML: the parameters behind the verdict, then further details
ParameterHTTrailSidecar ML
PriceFreeFree
Update frequencyβ€”Every 3 days
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, Mac β€” betteriPhone
Requires iOS17.0 β€” better26.0
Further details β€” not scored
Size23 MB5 MB
Age rating4++4
Developer1Moby Co., Ltd.Anders Fog Bunzel

In-app purchases

None

HTTrail

No in-app purchases

None

Sidecar ML

No in-app purchases

Questions

Is HTTrail free?
HTTrail is free to download, with no in-app purchases.
Is Sidecar ML free?
Sidecar ML is free to download, with no in-app purchases.
Do HTTrail or Sidecar ML have ads?
Neither HTTrail nor Sidecar ML shows ads.

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