Support
Getting started
How do I start measuring a server with Amplo?
Open the Monitor tab and enter a server's host and port. Amplo opens a single TCP connection, measures the round-trip time, and closes it. Each measurement appears as a beat on the phosphor-green EKG waveform. To save the Endpoint for repeated testing, switch to the Library tab and tap 'Add.' Name it, then return to Monitor to start measuring.
What's the difference between Monitor and Library?
Monitor is where you measure any host in real time—enter it once and see the live EKG. Library stores your favorite Endpoints (host, port, label, kind) so you can test them repeatedly without re-entering details. Your saved Endpoints appear in every tab, making it easy to switch between frequent targets.
Features
What do the colors on the EKG mean?
The phosphor-green waveform shows your live latency measurements. Green indicates latency under 50ms—genuinely fast. As latency rises, the color shifts to warn you that the server is slowing down. This visual feedback makes network problems visible instantly, replacing guesswork with real data you can see beat by beat.
How does the Compare feature work?
Choose two Endpoints in the Compare tab and run paired measurements simultaneously. Amplo performs a statistical significance test to determine whether one server is genuinely faster or if any difference is within noise. You'll see p50, p95, and p99 latencies for both, plus a verdict on which is statistically faster.
What's Reflex Lab?
Reflex Lab is a reaction-time game included in Amplo. It measures your personal response time to visual cues. By comparing your ReflexScore against network latency, you can distinguish between lag caused by the network versus lag you personally experience. Useful for gamers who want to know if the server is slow or if it's them.
Data
Where does Amplo store my measurements?
Everything is stored on your device — your Endpoints, Beats, Sessions, and ReflexScores never leave your phone. Amplo has no accounts, no subscriptions, no in-app purchases, and no cloud or iCloud sync, so there is no server-side or iCloud copy of your data. It stays entirely under your control, and you can delete any of it at any time from within the app.
Does Amplo back up or sync my data anywhere?
No. Amplo keeps your measurements only on your device and runs no cloud service — there is no iCloud backup, no account, and no sync. The trade-off is deliberately private: nothing about your endpoints or scores is ever uploaded, but the data also lives solely on this device, so it is not automatically carried to another phone.
What happens to my data if I uninstall Amplo?
Your measurements live only on your device. Deleting items inside the app removes them immediately; uninstalling Amplo removes the app and its on-device data following iOS's normal behavior. Because Amplo keeps no cloud or iCloud backup and runs no server, there is no remote copy — once data is gone from your device, it is gone everywhere.
Troubleshooting
Why does latency spike sometimes?
Latency can spike due to network congestion, packet loss, DNS resolution delays, or temporary server issues. The live EKG in Monitor helps you spot these spikes in real time. Check the Statistics tab for p95 and p99 values to understand worst-case latency. The History tab shows how the server behaves over a week.
Can I measure a server without entering a port?
Amplo requires both host and port because it opens a specific TCP connection. Most servers listen on standard ports: HTTP uses 80, HTTPS uses 443, game servers vary. If you are unsure of the port, check the server documentation or network configuration. Amplo doesn't guess.
Why is my reaction time in Reflex Lab slower than expected?
Reaction times depend on your device's display latency, touch response delay, and your personal neural reaction. Amplo measures the total from visual stimulus to touch, reflecting real-world lag you experience. By running Reflex Lab during the same time you measure your game server, you can isolate network lag from your device's contribution.