This paper presents the architecture of a Web app designed to deliver personalized content to museum visitors both indoors and outdoors. The app uses a tangible type of interface to obtain information about the museum's exhibits. For this purpose, each exhibit can be associated with an NFC tag, a Bluetooth Low Energy (BLE) beacon or a geofence in open-air museums. The service automatically profiles its users based on statistics about the preferred type of exhibits, media formats and time spent viewing each exhibit. Visitors can get the information they want about an exhibit even when the app is not running. Push notifications are used for this purpose. The necessary experiments have been conducted to prove the applicability of the service for real-time delivery of personalized content.