Comparison

API Client vs ByteSniffer

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

Head to head
About

API Client

Test REST APIs directly from your mobile device. Paste URLs, select methods, and view detailed responses including status codes, headers, and formatted JSON. Manage environments, save requests, and even import/export cURL commands.

Highlights
  • Paste URL and send requests
  • Smart JSON viewer with search
  • Environment management
  • Collections and history
  • cURL import and export
  • API monitoring
  • Test suites and assertions
  • API docs generator
Features
Read full description

Test any API right from your phone. Paste a URL, hit send, see the response. API Client is a lightweight REST and HTTP tester. No account needed. No cloud sync. No setup. Just open the app and start testing. โ–ธ JUST PASTE & SEND Enter any URL, pick a method (GET, POST, PUT, PATCH, DELETE), and tap Send. See status codes, response time, headers, and formatted JSON โ€” all in one view. โ–ธ SMART JSON VIEWER Collapsible JSON tree with search, tap-to-copy, and syntax highlighting. Format or minify JSON with one tap. Build request bodies visually without typing raw JSON. โ–ธ ENVIRONMENTS Switch between development, staging, and production with one tap. Each environment stores its own base URL, bearer token, API key, and custom headers. Use {{variables}} across all requests. โ–ธ COLLECTIONS & HISTORY Save requests to collections. Pin favorites for quick access. Full history grouped by date with one-tap rerun. Search across all saved requests. โ–ธ cURL IMPORT & EXPORT Paste any cURL command to import instantly. Export any request as cURL to share with your team or use in terminal scripts. โ–ธ API MONITORING Set up automatic health checks for your endpoints. Get push notifications when an API goes down or degrades. Track incidents and recovery times. โ–ธ TEST SUITES & ASSERTIONS Group requests into test suites. Add response assertions โ€” validate status codes, check JSON fields, verify headers. Run all tests with one tap. โ–ธ API DOCS GENERATOR Generate shareable PDF documentation for any endpoint โ€” method, URL, headers, body, response samples, and status codes included. WORKS GREAT FOR โ€ข Developers testing REST APIs from anywhere โ€ข Students learning HTTP methods and API concepts โ€ข QA engineers validating endpoints โ€ข DevOps checking microservice health โ€ข Anyone who needs an API client on mobile WHY API CLIENT? This app runs entirely on your device. Your API keys and tokens stay on your phone. No sign-up required โ€” just open and test. SUBSCRIPTION AND PRICING โ€ข RESTPilot Pro Lifetime โ€” $9.99, one payment โ€ข RESTPilot Pro Monthly โ€” $1.99 per month, renews automatically โ€ข Payment is charged to your Apple Account at confirmation of purchase โ€ข A subscription renews unless it is cancelled at least 24 hours before the end of the current period โ€ข Manage or cancel anytime in your Apple Account settings Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://cosmovex.web.app/apps/restpilot/privacy-policy

About

ByteSniffer

This tool allows developers to capture, inspect, and modify network traffic on their mobile devices. It enables debugging, API testing, and troubleshooting by providing features like request rewriting, session history, and scripting.

Highlights
  • HTTP capture and session history
  • Request and response inspection
  • Request and response rewrite tools
  • JavaScript scripting support
  • HTTPS MITM debugging
  • API debugging and testing
Features
Read full description

ByteSniffer is a professional network debugging tool designed for iOS developers, QA engineers, and networking professionals. It supports real-time capture and analysis of HTTP/HTTPS, SSE, WebSocket, TCP, and UDP traffic. You can inspect request headers, response content, real-time messages, bidirectional raw data, and data in multiple formats including Hex, Text, and JSON. ByteSniffer also provides useful tools such as Host filtering, capture history, full-text search, sharing and export, request replay, content rewriting, breakpoints, and JavaScript scripting. These features help you quickly troubleshoot API errors, connection issues, and data transmission problems. HTTPS and WSS traffic analysis requires installing and trusting the MITM certificate provided by the app. Some advanced features require Pro access. Please use ByteSniffer only with applications and network environments that you own or are authorized to test. Membership Purchase: Unlock permanent access for only CNY 19.9, including MITM, HTTPS, SSE, WebSocket, TCP, UDP, Replay, Rewrite, Breakpoints, and Scripts โ€” for about the price of a cup of milk tea. Privacy Policy: https://www.kdocs.cn/l/cbOGcxNm6ic9 User Agreement: https://www.kdocs.cn/l/cnVXUBVNwGOd

Screenshots

API Client4 screens
ByteSniffer4 screens

Verdict

The call

The clearest difference is review sentiment: ByteSniffer at 50% against API Client's 0%. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. API Client sells 2 in-app purchases, starting at $1.99 per month and ByteSniffer sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

API Client ships an update every 10 days, ByteSniffer every 8 days. The most recent releases landed on September 25, 2026 and September 20, 2026 respectively.

Scorecard1 real difference ยท 7 level
API Client versus ByteSniffer: the parameters behind the verdict, then further details
ParameterAPI ClientByteSniffer
PriceFreeFree
Positive reviews0.0% of reviews50.0% of reviews โ€” better
Update frequencyEvery 10 daysEvery 8 days โ€” better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 โ€” better15.6
Further details โ€” not scored
Size41 MB22 MB
Age rating17+4+
DeveloperSahana A Sๅญ˜้พ™ ้œ

Customer experience

API Client

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

ByteSniffer

Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

In-app purchases

2 purchases

API Client

Subscriptions1
  • RESTPilot Pro Monthly$1.991 Month
One-time1
  • Ad Free experience$9.99
4 purchases

ByteSniffer

Subscriptions3
  • Continuous monthly subscription$1.991 Month
  • Continuous seasonal subscription$3.993 Months
  • Continuous annual subscription$12.991 Year
One-time1
  • Permanent Pember$2.99

Questions

Is API Client free?
API Client is free to download, with in-app purchases available.
Is ByteSniffer free?
ByteSniffer is free to download, with in-app purchases available.
Do API Client or ByteSniffer have ads?
Neither API Client nor ByteSniffer shows ads.
Which is updated more often, API Client or ByteSniffer?
API Client ships an update every 10 days, and ByteSniffer every 8 days. Most recently, API Client was updated on September 25, 2026 and ByteSniffer on September 20, 2026.

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