The Harvest Your Data Apps are great for face to face or on site data collection but sometimes your respondents are remote and you want to send them a link to a survey. Harvest Your Data Web Forms are ideal for this.
You can control whether your form can only be completed once and can make the URL to the form unique so you know who completed it or you can send the same link to everyone and have the form completed as many times as you want.
Web Forms are supported in any modern web browser and they even look similar to form used in the Harvest Your Data apps!