There is around 100,000 iPhone app going around the Apple iTunes world, I'm mentioning a few that I've noticed has been growing ever so largely - from hotel industry.
A lot of them has either of this common functionality - look & book for hotels, using GPS to locate the hotel and photos/videos info of the hotel. But some does stand out from the rest, have a look below (this does not represent the whole collection just yet as there is just far too many apps as you know it).
Individual Hotel App
Shangri-La Hotel, TokyoThe app mentions a special rate and gift if users book via the app, this is a great incentive for users to use the app. Although it is an individual hotel, instead of the whole hotel group. Aside from that the app offers the standard map, what's around the hotel, photos, etc.
Show what games is available, how to play, entertainment schedule with video intro of the show, nightlife activities and the humongous hotel map (you'll need it for sure).
Integration with Aria Facebook & Twitter page for sharing, geo targeted content with special rewards, players online club to win prizes and full service hotel directory where you can call the hotel services (not that I imagine you'll be using that a lot). Quite an interesting and fun to have app.
Standard book the hotel with exclusive breakfast if you make the reservation from your favourite iPhone, it gives map, photo and video of the hotel, as well as Chicago city. Here's something for news update they pull it live from Twitter.
Hotel Group App
Here is something different - 100 cocktail recipes from different Renaissance hotels from around the globe, you can shake your iPhone for random cocktail you can show to your fav bartender, you can also share it via Facebook or Twitter to your friends or email it. It shows hotel location, how to get there via GPS and of course booking hotel room instead of the bar seat.
Standard look for hotels, map, photos and booking.
Standard look for hotels, book, check points and store hotel booking details.
Standard look and book for hotels, check HHonors point.
Standard booking, hotel location, photo and videos, as well as checking your loyalty rewards points, as well as checking using preferred code.
Offers standard GPS hotel location map, hotel photos and bookings; but with one click you can dial the hotel direct instead of browsing more pages, you can also access Priority points.
Again the app offer standard booking, hotel photos; but the difference is capability of viewing member points, upcoming stay and browse thelobby.com blog site for latest insight. Note there are several individual hotels from Starwood launching their own individual hotel app, so might be worth checking if you are staying in one of them.
A very basic simple app of pulling data from the website on looking for hotels, information and book.
The app offers standard global map hotel location, beautiful photos and booking capability.
Standard book hotel, photos and GPS map. You can request whatever you want in advance before your arrival through the iPhone.
Look and browse through the hotels, photo, amenities provided and make booking. The app is displayed in landscape mode.
Standard booking, hotel location and photos. A unique feature of highlighting what is different in each Conrad hotels.
Book the hotel feature, learn surrounding via GPS, provide driving/walking direction, access to Fairmont loyalty point and check latest travel packages. You can also take a picture, upload and share it on Fairmont's own dedicated social media site.