Is there a Safari extension that compares hotel prices on iPhone and iPad? Yes.
Updated November 11, 2026: Yes. Underbook for Safari is a free Safari extension for iPhone and iPad, on the App Store since November 10, 2026. On the hotel page you are viewing in Safari, it shows whether another booking site lists the same stay for less and whether the room name matches. Get Underbook for Safari on the App Store, then switch it on in Safari (the steps are below).
Get Underbook for Safari on the App Store
Free, for iPhone and iPad, iOS 16 or later. No account.
The facts, with their sources
| Fact | Source |
|---|---|
| Underbook for Safari is free, for iPhone and iPad, iOS 16 or later | Underbook's App Store listing and Apple's public lookup, read November 11, 2026 |
| On the App Store since November 10, 2026 | Apple's public lookup (release date), read November 11, 2026 |
| What it does, in the listing's words: "On a hotel page in Safari, see if another booking site lists the same stay for less and whether the room name matches." | Underbook's App Store listing, read November 11, 2026 |
| It compares every booking site Google Hotels lists for the stay, a median of 17 per hotel in our data | Directo alternatives, from our price study |
| Prices: taxes and fees as each site reports them; a resort or destination fee may be extra | Underbook's App Store listing, read November 11, 2026 |
| Another Safari option: Directo's site listed Safari on iPhone, in beta | Directo's site, read October 2026 (extensions compared) |
This page is by Underbook. Where our figures come from: how Underbook works. A correction to hi@underbook.co is welcome.
How to install it and switch it on
- Get Underbook for Safari on the App Store, free.
- Then open a hotel page in Safari, tap the page menu button in the address bar, choose Manage Extensions and switch on Underbook.
- When Safari asks, allow it on the booking site, or on every website so it also works on hotels' own sites.
- You can also do this in Settings, then Apps, Safari, Extensions.
- If the card does not appear by itself, choose Underbook from the page menu.
Which booking sites it reads
Underbook works on hotel pages: it has rules for Booking.com, Expedia and its sister sites (such as Hotels.com, Hotwire, Orbitz and Travelocity), Agoda, Trip.com, Priceline, Marriott and Hilton, and it recognizes many other hotels' own websites from the page itself. On a hotel page of each of Booking.com, Expedia, Hotels.com, Agoda, Trip.com, Priceline, Marriott and Hilton, opened in Safari on an iPhone in our test of November 9, 2026, the card appeared.
What it cannot do
- No Mac version yet: a version for Safari on a Mac is not listed yet. On a Mac, Underbook runs in Chrome, Microsoft Edge and Firefox.
- Safari only on an iPhone or iPad: extensions do not run in Chrome on an iPhone, so Underbook does not run in Chrome or Edge on a phone or tablet.
- No app needed for one check: the free web price checker works in any browser, on a phone, a tablet or a computer: type one hotel and your dates. More on phones: compare a hotel's prices on your phone.
- Only the sites Google Hotels lists: a site Google Hotels does not list for that stay is not in the comparison. A price can change between the check and the site, so read the total on the site before you pay: taxes and fees as each site reports them; a resort or destination fee may be extra.
Common questions
Is there a Safari extension that compares hotel prices on iPhone?
Yes. Underbook for Safari, free on the App Store for iPhone and iPad since November 10, 2026, shows on the hotel page you are viewing in Safari whether another booking site lists the same stay for less and whether the room name matches. Get Underbook for Safari on the App Store, then switch it on in Safari.
Does it work on an iPad?
Yes, in Safari on an iPad, from the same App Store listing. Switch it on the same way.
Does Underbook work in Safari on a Mac?
Not yet: a version for Safari on a Mac is not listed yet. On a Mac, Underbook runs in Chrome, Microsoft Edge and Firefox, and the free web price checker runs in Safari too.
Does it work in Chrome on an iPhone?
No. On an iPhone or iPad it runs in Safari only; Chrome and Edge there do not run it. In any browser, use the free web price checker: type one hotel and your dates.
Which booking sites does it read?
Booking.com, Expedia and its sister sites (such as Hotels.com, Hotwire, Orbitz and Travelocity), Agoda, Trip.com, Priceline, Marriott and Hilton, and it recognizes many other hotels' own websites from the page itself.
Is it free? Does it book the hotel?
It is free. It does not book: each site's button opens that site, and you book there. If you book through a site we link to, we may earn a commission, which never changes the order of prices.
Real prices, hotel by hotel
Every site's price at 5,970 hotels in 368 cities
From our price snapshots of September 25, 2026, September 28, 2026, September 29, 2026, September 30, 2026, October 1, 2026, October 3, 2026 and October 10, 2026: each hotel's page lists every booking site Google Hotels showed, the going rate, and whether the lowest-priced listing named a room, with a button to check today's price for your own dates.
By region: United States · Europe · Canada, Latin America, Caribbean · Asia-Pacific, Middle East, Africa
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Every site Google Hotels lists, on the page you are on.
Underbook shows the other booking sites' prices for the hotel and dates you are viewing, all-in where the sites report taxes and fees, and says whether a lower one names your room. Free on Chrome, Edge and Firefox, and in Safari on iPhone and iPad.
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