New in 2.3: wake your computer away from home, through your own VPN. Plus network names and the Checkup. No ads, trackers or accounts.
Is it my Wi-Fi, or is the site down? Where does the connection break? Why does Safari distrust this certificate? Is my public IP really mine, or am I behind my carrier's NAT? Did my computer really wake up?
Radien answers these questions on your iPhone or iPad, directly on the device, and honest about what it can and can't see. No ads, no trackers, no analytics, no accounts. Nothing you type is sent to a server we operate.
WHAT'S INSIDE
• Radien Checkup: one run checks your Wi-Fi, router, internet, DNS and websites, and tells you what is wrong.
• Wake on LAN: wake a computer, NAS, server or gaming PC on your network, or away from home through your own VPN, then watch it wake. Radien sends the Magic Packet, watches for an answer, and says whether it woke and what to check if it did not. Siri, Shortcuts and widgets can wake it too.
• Ping: latency, jitter and packet loss to any host, with a live chart and a plain-language verdict. Your router is one tap away.
• Multi Ping: compare up to four hosts side by side, at once. Saved groups load a whole comparison in one tap.
• Traceroute: every hop between you and a destination, with reverse-DNS names, the network that holds each address, and a read of where delay or loss truly begins.
• DNS Lookup & Reverse DNS: query A, AAAA, MX, TXT, NS and more against the system resolver or Google, Cloudflare and Quad9. Enter an IP for a reverse PTR lookup and the network that holds it.
• Port Scanner: which TCP ports are open, closed or filtered (usually a firewall), never a fake vulnerability claim.
• TLS Inspector: read a site's TLS/SSL certificate chain, protocol versions and cipher support, straight from your device. No third-party grading service, no invented grades.
• Subnet Calculator: IPv4 and IPv6 math: CIDR, network, broadcast, host ranges and equal splits, with a live bit view and RFC-correct /31 and /32.
• IP Converter: turn any IP notation into every other form, and see how an IPv4 address rides inside IPv6.
• MAC Converter: every MAC address notation, EUI-64, link-local, and a fully offline vendor lookup. Randomized phone MACs are flagged as randomized, never given a fake vendor.
• Network Details: your Wi-Fi name and access point vendor, local and public IP address with its network owner, router address, DNS servers, your real cellular radio (5G, or 5G riding a 4G core) and NAT64 detection, one tap from the always-on status header.
ACCESSIBILITY
Every screen is tested by hand with VoiceOver. Result rows read as one sentence, every long-press action is also a rotor action, and the ping chart supports Apple's Audio Graphs, so you can hear your connection as rising and falling tones. Larger Text, Reduce Motion and Voice Control are supported. One honest limit: I have no Braille display, so Braille output is untested.
PRIVATE BY DESIGN
Radien uses Apple frameworks only: no third-party SDKs, no analytics, no data collection. The MAC vendor and network owner tables are bundled on the device, and certificates are read locally, never sent to a checking service. Your network is your business.
RADIEN PRO
Radien is free to use, with a one-time Radien Pro unlock for the power features: Radien Checkup, Multi Ping, more Wake on LAN devices with groups, widgets and the Control Center control, custom DNS resolvers and extra record types, advanced port presets, full TLS depth, MAC vendor lookup, network names, alternate app icons, tuning options and sharing. Buy once, keep forever. No subscription.
Built by an independent developer. Feedback is welcome and read personally.
I've been getting more into network utils lately and was happy to have stumbled upon this. The UI is simple and clean, works as advertised and works flawlessly with the VoiceOver utility. If you are doing network diagnostics, Radien is definitely worth your time.
Developer Response
Thank you!The VoiceOver line made my day: Radien's accessibility was shaped by blind and low-vision testers from the AppleVis community, so "works flawlessly" is the sentence I was hoping someone would one day write. If a diagnosis ever leaves you missing a tool, write me at radien@arsenkin.name. I read everything.
Wake on LAN now works through your own VPN when you are away from home. Your VPN must reach your home network: WireGuard or Tailscale on your router, or on a Raspberry Pi, a NAS or a Mac at home that stays on. The computer's card then says "Wakes through your VPN". Tap Wake, and Radien sends the Magic Packet through the VPN to the computer's address and to your home network's broadcast address, then watches through the VPN for the computer to answer. Check Now, Siri and Shortcuts work through the VPN too.
Waking through a VPN is part of Radien Pro, and it needs the computer's address, saved in Edit Device. The help sheet explains what the device at home needs. A VPN service that carries all your traffic may not reach your home network, so Radien does not wake through one.
Version 2.3
In-App Purchases
Radien Pro
Unlock every advanced tool, forever.
$9.99
The developer, IGOR ARSENKIN, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
VoiceOver
Voice Control
Larger Text
Dark Interface
Sufficient Contrast
Reduced Motion
Information
Seller
IGOR ARSENKIN
Size
21.5 MB
Category
Utilities
Compatibility
Requires iOS 18.0 or later.
iPhone Requires iOS 18.0 or later.
iPad Requires iPadOS 18.0 or later.
Mac Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.