What’s more, nearly 30% of respondents say they would be more likely to tip if they had to tap a button that says “no tip,” a feature many establishments use. More than four in 10 consumers say being in close proximity to their server at the time of the transaction can prompt them to leave a tip when they otherwise might not have. When software research company Software Advice surveyed consumers who use iPads or similar devices to buy food and drink, it found that the use of iPads increases the amount many people tip when they pay. If you buy a cup of coffee or lunch and your server pulls out an iPad, pay attention: You could wind up leaving a higher tip without even realizing it.