How to get 1000 subscribers to your App ? what is the cheapest / fastest way to achieve it ?

A crisp answer here. - Leverage PH launches - Build side projects - Engage influencers - Submit product to Betalist as early as possible. - Build traction by posting constant updates on Twitter, IndieHackers, Reddit - Be part of closed communities like MicroSaaSHQ - Cold outreach (DMs, Emails, LinkedIn etc) If you iterate the above process for 3 months, you can build your waitlist and that should be a good pointer for you to start talking to wait list users. But I wrote it at length here for To-be-founders at zerotofounder.co

PPC ads will get you there, although it's not guaranteed that they will be your 'best users'. Anything with a social/community element to whatever you're building can run the risk of getting very spammy and low-value users.

Facebook ads