Then don’t cause major versions casually, and charge a reasonable upgrade fee when more value is delivered with a major upgrade.
I get that you have expenses, and things like servers cost money-but you’re not providing the server here.
But we’re also a small group of independent developers, and it’s a pretty complex app. We’ve already spent over a year building it, and we can’t keep putting in time and money unless it at least pays for itself. We’re still figuring out whether there’s enough interest to support it long-term. If not… well, that tells us what we need to know.
Home Assistant isn’t exactly mainstream, so we’re not expecting millions of users. It’s simple math — either a small number of people pitch in a bit to keep it going, or the project dies.
I don’t know if 1.5 USD/month (or 3 USD for the family plan) is a big stretch — it’s about the cost of a cup of coffee. And if you work in tech and earn something like 50 USD/hour, that’s 3–4 minutes of your time. If the app saves you even that much effort each month, it’s probably worth it. If not — fair enough!
Put your pricing up front - don't waste my time.
> For comparison, Home Assistant’s Nabu Casa service costs several times more.
Undercutting Home Assistant's added services on price doesn't feel particularly elegant since this is what they use to fund HA development.
Then the conversion itself. The goal is to type a number and one-two letters and get a relevant result. So there are many heuristics there. For example, 0.1 meter will be converted to 3.94 inches, 1 meter — to 3.28 ft and 10000 meters — to 6.21 miles. And there is much more of that.
At last we needed the app to work well on every device that is supported by iOS7. iPhone 4 is not a fast device by today standards. So optimization was a little bit challenging also.
Maybe you have any particular question in mind?
Looks great, though!