Sandglass Saver is a time-based activity timer app for iPhone® and Apple Watch®. The builtin activity types focus on activities that are billed by time, which can help you save money by paying in time, or let you know how long a service is used. With this app, you no longer have to worry about the embarrassment of overtime by 1 minute and 1 hour extra fees. When you are parking your car in a commerical parking lot, or making some short term rentals, this app will get you notified in time before incoming billing cycle. Just set the start time, then start timing. If you want, you can adjust the billing cycle and remind timing for your activity. App Features - Five different billing activity types, including parking, shared bike rental, shared motocycle rental, power bank rental and customized timing. Each type has optimal default billing cycle for timing. - Record parking spot identifier in case you forgot where you parked your car. Record payment QR code of the parking lot, so that you can pay parking fees in advance by mobile. - Record saved expenses as you want so you can know your money saving achievement well. - Each activity type support billing cycle and remind timing adjustment. You will be reminded by notifications. - Support different complication families on Apple Watch and two families of widgets on iPhone. When you add a complication of this app to watch face, or add a widget of this app to Home Screen, you can see information of the activity at a glance.