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Monitor your ClickHouse cluster from your iPhone

An alert fires at 2 a.m. and your laptop is across the room. With ProbeDeck you open your iPhone, connect to your ClickHouse cluster over TLS or through your SSH bastion, and within seconds you know whether queries are backing up, a replica is lagging, or a disk is filling. Monitoring is free, so you can run it against your own production before you ever pay.

One minute, no signup

Triage a ClickHouse alert from your phone

One incident, start to finish: cluster health on iPad, running queries sorted by elapsed time, then the memory and bytes read of the query hurting the cluster. Killing that query is the only step that costs money, and it needs the one-time Pro unlock.

Everything in the video runs on the app's built-in demo data. English subtitles included.Watch on YouTube

Cluster health at a glance

ProbeDeck ClickHouse monitoring dashboard on iPhone showing health tiles
Health tiles: running queries, replication, disks, parts, merges, QPS and memory

The Monitoring dashboard is the main screen. It surfaces health tiles for the whole cluster: running queries, replication, disks, parts, mutations, merges, QPS and memory. Each tile is graded healthy, warning, or critical, so a single glance tells you whether everything is fine. Pull to refresh, or let it poll while the screen is open.

See what's running, right now

ProbeDeck running queries on iPhone reading system.processes, with query_id, user, memory and elapsed time colour-graded from green to red
Elapsed time is colour-graded, so the longest-running query is the first thing you see

ProbeDeck reads system.processes live: query_id, user, elapsed time with a colour grade, memory, and rows read. During an incident you can see exactly which SELECT is loading the cluster. Killing a runaway query is a one-time Pro unlock. The button stays visible for free with a PRO badge, so you find it while the cluster is calm.

Replica lag and read-only detection

ProbeDeck replication screen on iPhone showing per-table absolute_delay, queue size and active replicas, flagged as lagging, quorum loss, Keeper lost and read-only
Per table: absolute_delay, queue size, active replicas, and the reason each one is flagged

Replication problems are a ClickHouse-specific on-call surface that generic clients miss. ProbeDeck reads system.replicas andsystem.replication_queue to show absolute delay, queue size, and the read-only flag that means Keeper is unreachable. You can triage lag from the alert, before your users feel it.

Secure access over TLS or your SSH bastion

ProbeDeck connections list on iPhone grouped by environment, with PROD badges and TLS, SSH and read-only markers per connection
Each saved connection carries its own transport and PROD marking: TLS, SSH tunnel, read-only

ProbeDeck connects directly from your iPhone to ClickHouse over its HTTPS/TLS interface, or through an SSH tunnel to reach a cluster behind a firewall, with password or key and host-key verification. Nothing is proxied or relayed through us. The app stores connections in the iOS Keychain and never syncs them to any external service, so your credentials stay on the device.

Get ProbeDeck

ProbeDeck is an iOS 17+ app by Vladimir Chemeris. Monitoring is free forever; a one-time Pro unlock ($19.99) adds the operations: kill, writes, and the AI assistant. No subscription.

Download on the App Store

Free download · One-time Pro unlock $19.99 · no subscription

Learn more on the ClickHouse client for iOS overview, see how to kill a runaway query, or read the guide to mobile ClickHouse monitoring.

Try it with no server

See every screen before you type a password

Open ProbeDeck and tap Explore demo data on the empty connection list. The whole app runs on bundled sample data: the health dashboard, running queries, replicas, parts and merges, mutations, the schema browser and SQL results. Demo mode opens no network connection and stores nothing. Connect a real cluster when you are ready, and your credentials go to the iOS Keychain on your device.

  • Runs on bundled sample data
  • Opens no connection, stores nothing

ClickHouse is a registered trademark of ClickHouse, Inc. ProbeDeck is not affiliated with, endorsed by, or sponsored by ClickHouse, Inc.