# Layer3 – Network Tools

> Layer3 – Network Tools (iPhone/iPad app by Christian Bumberger.)

- Source: https://appshunter.io/ios/app/layer3-network-tools/id6818861411 (this page in markdown: same URL + `.md`)
- Developer: [Christian Bumberger](https://appshunter.io/developer/939556226)
- Category: Utilities
- Price: $8.99
- Age rating: 4+
- Requires: iOS 18.0 · 8 MB
- Languages: English, German
- Released: 2026-10-07
- Data updated: 2026-10-09

## What is Layer3?

Layer3 bundles the things an admin does all day – on iPhone, iPad and Mac, without opening the laptop. Every device you find is a card from which all tools are one tap away.

FIND DEVICES
• Home page with the device list of your network: ping sweep, hostnames, vendors from the IEEE registry
• Scan history with a diff to the previous scan: new, gone, moved, renamed
• MAC addresses from your router’s ARP table (SNMP) or from the Layer3 Agent – even for devices that do not answer ping
• Search by name, IP, MAC or vendor; open any address directly

CHECK
• Ping with statistics, jitter and history, IPv4 and IPv6
• Traceroute through the Layer3 Agent: hops live with names and packet loss, ICMP or UDP
• Port check: common ports, 1–1024 or your own list, with banners; web ports open in the browser
• Path MTU: the largest packet size that gets through without fragmentation
• Diagnosis assistant: checks DNS, ping, web ports and MTU and tells you in plain words what is wrong

DNS & WHOIS
• DNS lookup for all record types, system resolver or Cloudflare, Google, Quad9, your own server
• Resolver comparison – four resolvers at once, e.g. after DNS changes
• Whois for domains, IP addresses and AS numbers, following referrals to the responsible server
• My Network: public IP and ASN, the way the internet sees you

SUBNETS
• Calculator for IPv4 and IPv6 with binary view
• Split, VLSM planning and summarization
• Config snippets for Cisco, MikroTik, Juniper, FortiGate and Linux; export as CSV and Markdown

SNMP
• System info, interfaces and ARP table of your router (SNMPv2c, read-only)

LAYER3 AGENT (MAC, FREE)
iPhone and iPad are not allowed to run traceroute and cannot see MAC addresses. The free Layer3 Agent runs on a Mac in your network and takes over exactly that. Layer3 discovers it automatically, you enter a pairing code once – the connection is encrypted and stays within your network. Download and guide: bumberger.at/layer3

PRIVACY
No account, no ads, no tracking, no cloud. Scans and settings stay on your device. Only DNS, whois and “My Network” query – when you start them – the respective resolvers and whois servers.

English and German. Universal purchase for iPhone, iPad and Mac.

## Is Layer3 safe?

Not enough ratings yet to assess Layer3.

## Is Layer3 legit?

Layer3 – Network Tools has limited verification signals. The AppsHunter Legitimacy Score for Layer3 is 55 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-07

No release notes.

## More apps by Christian Bumberger

- [Parking Heater Remote](https://appshunter.io/ios/app/parking-heater-remote/id6816491689)
- [Switchworks](https://appshunter.io/ios/app/switchworks/id6817462910)
- [NotAfter: TLS Monitor](https://appshunter.io/ios/app/notafter-tls-monitor/id6818526699)
- [EHLO – Mail Server Tester](https://appshunter.io/ios/app/ehlo-mail-server-tester/id6819353987)

All apps by Christian Bumberger: https://appshunter.io/developer/939556226

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-09.*