Comparison

a vs ByteSniffer

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

Head to head
About

a

This app provides a local Unix terminal emulator for iOS devices, enabling users to run various Unix commands, edit files, and process data. It includes support for multiple programming languages and network utilities, with integration for iOS Shortcuts and multi-window functionality.

Highlights
  • Local Unix terminal emulator
  • Run Unix commands
  • File transfer (scp, curl)
  • Text editing (vim, ed)
  • Programming languages (Python, Lua, C)
  • Network utilities (ping, nslookup)
  • iOS Shortcuts integration
Features
Read full description

a-Shell is a complete local terminal emulator, allowing to run most Unix commands on your iOS device. You can transfer files using scp and curl, edit them with vim and ed, process them using grep, awk and sed. You can work with git repositories using lg2.  Most commands are compiled for iOS native Arm64 format, making them fast and well integrated with the BSD Unix that powers iOS/iPadOS. a-Shell includes Python, Lua, Perl, JavaScript, C, C++ for programming and TeX (texlive 2025, with Tikz and LuaTeX) for text processing. There are also multiple network utilities: nslookup, ping, whois, ifconfig... Type help for help, help -l to get the full list of commands. a-Shell can be controlled from Shortcuts: run commands in order, process files in a-Shell, get the results as text or files, transfer files to other apps... a-shell uses iOS 13+ “multiple windows” ability, so you can run multiple shells at the same time, with different commands, in different directories. You can edit a file in one window with vim and process it in the other with python. Compile your C or C++ programs to webAssembly using clang or clang++, and execute the resulting binary. A complete webAssembly SDK is included (WASI-libc). a-Shell is the complete version. If you need a smaller app, and you don't need a C compiler, a TeX engine, or numpy and matplotlib, there is a-Shell mini.

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 — 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

a4 screens
ByteSniffer4 screens

Verdict

The call

The clearest difference is in-app purchases: a at none against ByteSniffer's 1. a also leads on review sentiment (78% vs 50%) and chart position (#23 vs unranked). ByteSniffer's advantage is update cadence (every 8 days vs monthly). On price, ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ByteSniffer sells 1 one-off in-app purchase. a asks for nothing beyond the download.

UpkeepUpdate frequency

a ships an update monthly, ByteSniffer every 8 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard5 real differences · 6 level
a versus ByteSniffer: the parameters behind the verdict, then further details
ParameteraByteSniffer
PriceFreeFree
Rating4.6 (568 ratings) — better—
Positive reviews78.3% of reviews — better50.0% of reviews
Number of ratings568 — better—
Update frequencyMonthlyEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
Best chart rank#23 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size2.1 GB22 MB
Age rating17+4+
DeveloperNicolas Holzschuch存龙 霍

Customer experience

a

All ratings568 ratings
Positive88.4%
Neutral4.6%
Negative7.0%
Written reviews392 reviews
Positive78.3%
Neutral9.4%
Negative12.2%

ByteSniffer

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

Bugs and requests

a

Reported bugs

3 issues
  • Toolbar buttons not accessible in portrait mode on some devices
  • Pasting from clipboard can insert unexpected characters
  • Sourcing certain script files causes crashes

Requested features

5 requests
  • Add support for package managers like Homebrew or APT
  • Implement more advanced shell features like job control and better tab completion
  • Integrate Git for version control
  • Allow installing additional packages and libraries
  • Improve clipboard and file management integration

ByteSniffer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

a

No in-app purchases

1 purchases

ByteSniffer

One-time1
  • Permanent Pember$2.99

Questions

Is a free?
a is free to download, with no in-app purchases.
Is ByteSniffer free?
ByteSniffer is free to download, with in-app purchases available.
Do a or ByteSniffer have ads?
Neither a nor ByteSniffer shows ads.
Which is updated more often, a or ByteSniffer?
a ships an update monthly, and ByteSniffer every 8 days. Most recently, a was updated on November 3, 2026 and ByteSniffer on November 5, 2026.

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