Nothing particularly wrong with that; that's how I got started too back in the 90's. Maybe the difference was that I was doing it for fun, and payment was totally optional, so I thought hey, maybe I'll make some spare change. Today the environment feels... greedy? Not saying this app's author feels that way, just pontificating on the state of the startup industry.
My rude, unsolicited, very possibly erroneous, but ultimately well-intentioned suggestion is that you release it as a free service and maybe open source it. If you brand it well you can collect some stars. But I can't see someone paying for this.
I don't see any reason why I make it for free or even open source. I charge my customers monthly fee is not just based on how much time I spend to build, it's about how much commitment I have to keep it working to provide my customers high quality service.
If you think give tips to a waiter/waitress after they serve you meals and drinks makes sense, and then, why I provide my service for free? My pricing mode maybe need to judge a little in the future, but free is never my option.
I'm not saying you don't deserve pay for your work, or that it's somehow wrong of you to charge money. I'm worried you'll have trouble finding paying customers because you're competing with a feature that Slack already comes with (slackbot).
I want this to work for you! If you find a way to sell this, I'll be pleasantly impressed and delighted to admit I was wrong.
We launched brb.life last year, also a super simple app. No payments yet but we have about 70 users of all sizes. I even got an email from IBM asking about our data store methods because a team wanted to install it...
I think there is a case for a meta tool that includes something like draft + other Slack productivity tools in a single bundle where many different use cases are covered with a single price point
Honestly seems better suited to a little side project that scratches your own itch that you can make available for free than for a tiny SAAS. Not saying that you shouldn't figure out a way to monetize it, if you can great for you! Just don't think you'll get many takers at a price/user...
Thanks for sharing with me about what you think about the pricing. I'm still collecting feedbacks about my app. My current pricing model just try to follow what Slack pricing model. After all, I'm a newbie to this platform.
FYI, you can use it for free, surprise! :-D If you don't pay the monthly bill after 14 days, you only get a reminder message at bottom of previewing message, but, no other impacts.
Wanna give a try?