Develop a survey, questionnaire, or focus group to determine what features and design elements are most important to the users and what their expectations are.

Review the timeline for developing the web app and determine when the launch will occur.

Utilize a social media scheduling platform to plan out content to be posted in the days leading up to the launch.

Create a press release to be sent out to media outlets announcing the launch of the web app.

Set up automated emails to be sent out in the days leading up to the launch with information about the product and its benefits.

Research influencers in the Software Development industry and invite them to the launch.

Create an account on the product hunt website and post details about the web app.

Submit the press release to media outlets.

Send out emails to those on the list who were previously invited to the launch.

Utilize the social media scheduling platform to post content about the launch of the web app.

Respond to comments and messages on social media, as well as engage in discussions with influencers.