StimuliApp vs How Much Do I Owe?

StimuliApp is an app designed to create psychophysical tests with precise timing on iOS devices (iPad and iPhone). Psychophysical tests are tests to assess perceptual capabilities. With a simple system of menus, different types of tests including the most common stimuli (gabors, random dots, images, sounds and videos among others) can be created. Programming skills are not necessary. Features: - Precise timing (frames are not dropped) thanks to the use of the native framework Metal, which provides a direct access to the GPU of the iOS device. - Option to run tests at 60 or 120 Hz depending on the model of the device. - Visual and auditory stimulation are synchronized. - Interactive creation of stimuli using real-time preview. - Possibility of using different spatial and time units. - Gamma-correction features. - Automatic report generation.

When going out with a group to a restaurant, often times one person will pick up the tab (hereafter referred to as "the host") and the rest will have to pay them back. There is often confusion regarding how to split the tax and tip accurately, fairly, and consistently among the group. This app will help you quickly calculate how much of the tax and tip you owe, as well as the amount you need to pay back the host. If everyone in the group uses this app to calculate the amount they owe, this will ensure the host will get paid back correctly, and no one will overpay or underpay. The app uses a formula that allocates tax, tip, and other fees proportionally based on the relative size of your order, which is the fairest way to split bills (as opposed to, for example, splitting the tax and tip evenly across the group, which would result in people who ordered less subsidizing people who ordered more). For example, if the items you bought form 10% of the bill subtotal (price sum of all items bought by everyone, before tax, tip, and other fees), then you would also pay 10% of the tax, tip, and other fees, which amounts to paying 10% of the bill total. The app uses the formula below to help you quickly calculate how much you owe, without relying on a calculator, which reduces mistakes. Amount owed = ( ( your item 1 + your item 2 + your item 3 + ... ) / bill subtotal ) * bill total To make sure everyone is on the same page, tell the group that you will be using this app to calculate the amount you will pay back. You can also use the app for splitting bills other than restaurant bills, like itemized shopping receipts, groceries, travel, and other expenses. The app also provides a tip calculator.