Best Website Uptime Monitoring Apps for iPhone (2026)

By Paul Snyman · July 29, 2026 · 8 min read

Quick picks. Uptime + SSL cert monitoring in one subscription: PingKit Guardian ($2.99/mo on iPhone and Mac), with one site and one domain free. Multi-location enterprise-grade checks: Uptime.com. Simple phone-first widget for a couple of personal sites: Pulse.

Download Free on the App Store

One website checked every hour is free, with a push to your iPhone when it goes down. All 19 tools are free too, with no ads and no account.

If you run a side project, a small business site, or an internal tool people depend on, the goal isn't a dashboard - it's finding out the moment something breaks, before a customer has to tell you. Here's how the realistic iPhone options for that compare in 2026.

What to Look For

How checks actually run. This is the detail that matters most and the one marketing copy tends to gloss over - see the note below.
Alert channel - push notification is the one you'll actually see; email gets buried.
Free tier limits - how many endpoints, and at what check interval.
Certificate monitoring - whether it also watches for an expiring TLS certificate, a separate and common cause of "sudden" outages.
Protocol coverage - plain HTTP is the baseline; some tools also check TCP ports, DNS records, or WebSockets.

The constraint every app in this category shares. iOS strictly limits how often any app can wake up and run in the background - no app can guarantee a check every minute from the phone alone. Apps get around this one of two ways: running checks from their own server in the cloud (so your phone just receives the alert), or pairing the phone with an always-on companion that does the actual checking. Whichever an app uses, that's the real answer to "how often does this actually check," not the number on the marketing page.

The Comparison

App	How checks run	Alerts	Cert monitoring	Price
PingKit (free)	Cloud (PingKit's backend, 1 URL hourly)	Push	1 domain	Free
PingKit Guardian	Cloud (PingKit's backend, 10 targets every 5 minutes)	Push, plus a notification on a Mac that is awake	5 domains	$2.99/mo
PingKit Guardian Plus	Cloud (PingKit's backend, 10 targets every 5 minutes)	Push, email, webhook	50 domains	$9.99/mo on iPhone
Uptime.com	Cloud, 30 locations (account required)	Push/email	Yes	Free or paid account
Pulse	iPhone background refresh only	Local notification	No	Free
Uptime-monitor	Runs from your Mac/iPhone/iPad	Local/webhook	Yes	Free (+$4.99/yr)
UptimeRobot	Cloud (account required)	Push	Yes	Free (50 monitors) or paid

We make one of these (PingKit Guardian), so treat the recommendation accordingly. Verify current pricing and features on each listing before you decide - subscription tiers and free-tier limits change.

App-by-App

PingKit Guardian (Uptime Watch)

Add the URLs you care about and PingKit checks them from PingKit's own backend - not from your phone or Mac. One URL is free, permanently, checked hourly with 7 days of history. Guardian ($2.99/mo) watches ten targets every five minutes with 30 days of history and an hourly response-time chart, and a target can be a website or a TCP port, with an optional keyword the page must contain or an exact status code. A site that answers 401, 403 or 405 is marked as refusing automated checks rather than down and is left out of its uptime figure; on iPhone, PingKit explains why and offers the User-Agent to give the site owner. The free PingKit Mac Agent and the iPhone app are both just where you add targets and view status, and each keeps its own list: a target added on your iPhone pushes to your iPhone when it changes state, free or paid, while one added in the Mac Agent alerts on the Mac only with Guardian and while the Mac is awake. Cert Monitor covers certificate expiry alongside it, from readings each device takes of the certificates added on it (your iPhone each time you open Cert Monitor, PingKit Agent every hour on a Mac that is awake): one domain free, five with Guardian, 50 with Guardian Plus ($9.99/mo on iPhone, $4.99/mo on Mac), so Guardian alone gets you both "is it up" and "is the certificate about to expire". Guardian Plus adds email alerts, with a summary every Monday, and a webhook that Slack and Discord accept as it is. What it does not have: checks faster than every five minutes, multi-region checks, or status pages.

Uptime.com

An established uptime-monitoring service with a free iPhone companion app - though using it requires a free-or-paid Uptime.com account. Per its listing, checks run from Uptime.com's own cloud infrastructure at one-minute intervals across 30 locations on 5 continents, so coverage doesn't depend on any of your own devices being online, and SSL certificate checking is included.

Pulse

A free, iPhone-native app with home screen widgets for at-a-glance site status and a local notification when a site goes down. Per its own listing, checks run through iOS's system-level background scheduling on your phone - there's no cloud backend or companion device - so it's subject to the same background-execution limits described above rather than sidestepping them.

Uptime-monitor

Positions itself around private monitoring with broader protocol coverage than plain HTTP - websites, APIs, WebSockets, TCP ports, DNS records, and SSL certificates - with local history and failure webhooks, runnable from Mac, iPhone, or iPad. Free, with a $4.99/year unlock for the full feature set. The developer states it collects no data from the app.

UptimeRobot

The mobile companion to the well-known UptimeRobot service. Free tier covers 50 monitors with no credit card required, checking from UptimeRobot's cloud infrastructure rather than your device; paid tiers add shorter check intervals and start at $9.99. SSL/domain expiry monitoring is included as a monitor type alongside HTTP, ping, port, and DNS checks. Requires an UptimeRobot account.

Which Should You Pick?

Want uptime and SSL certificate monitoring in one subscription, alongside a network toolkit you already use: PingKit Guardian ($2.99/mo), or Guardian Plus ($9.99/mo on iPhone) for up to 50 certificate domains.
Want established, account-based cloud monitoring with a generous free tier: UptimeRobot or Uptime.com.
Want a simple, phone-first widget for a couple of personal sites and don't mind background-refresh limits: Pulse.
Want to monitor DNS records or WebSockets as well as HTTP and TCP ports, without an account: Uptime-monitor.
Monitoring something business-critical that needs sub-minute checks, RUM, or status pages: none of these are built for that - see our PingKit vs Pingdom comparison for enterprise-grade monitoring instead.

Uptime Isn't the Only Thing That Breaks

A site can pass every uptime check and still fail every visitor the moment its TLS certificate expires - browsers will refuse the connection outright. It's a genuinely common, entirely preventable outage, which is why certificate expiry monitoring is worth pairing with uptime checks rather than treating as a separate concern. See How to Monitor SSL Certificate Expiration for why it happens and how to get ahead of it.

Frequently Asked Questions

Can an iPhone app really monitor my website 24/7?

Not from the phone alone. iOS strictly limits how often any app can run in the background, so an app that claims true continuous monitoring has to run the actual checks somewhere else - typically its own server in the cloud. That's what PingKit does too: Uptime Watch checks run from PingKit's backend, every five minutes with Guardian and hourly on the free tier, and the free Mac Agent is a convenient place to manage targets, not the thing doing the polling. An iPhone-only app with no server behind it can only check opportunistically in the background, roughly hourly at best.

What's the difference between uptime monitoring and SSL certificate monitoring?

Uptime monitoring checks whether your site responds to a request right now. Certificate monitoring checks whether the site's TLS certificate is still valid and not about to expire. A site can be fully up and still about to break for every visitor the moment its certificate lapses, so the two checks catch different failure modes.

Is free uptime monitoring good enough for a small project?

For a personal site or side project, checking your homepage or a health endpoint every so often is usually enough to catch outages before a user has to tell you. It's worth moving to a paid, higher-frequency plan the moment downtime would cost you something real - lost customers, revenue, or a support ticket you'd rather have avoided.

Get Alerted When Something Breaks

PingKit Guardian checks up to ten sites every five minutes from PingKit's backend (one site hourly for free) and pushes alerts to your iPhone when something changes. Cert Monitor adds SSL certificate expiry alerts on top, for the certificates your iPhone checks each time you open Cert Monitor: one domain free, five with Guardian, 50 with Guardian Plus.