I use heroku worker for free plan to deploy my twitter bot and I make it work all day, but my dyno doesn't be consumed(I checked Account settings/Billing/Free Dyno Usage).
Please teach me why it is?
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I am new to Heroku, created an app and deployed on heroku free account. And I want use endpoint of that app as publicly accessible endpoint. In heroku documentation it is mentioned heroku API can be called for 4500/hour. I am confused that will this limitation will be applicable to publicly accessible endpoint also?
and how much dyno hours do we get for the standard account/paid account ?
The Platform API is meant for developers who want to programmatically manage the applications (create/destroy Dynos, etc...). Here the max 4500 calls per hour applies.
There is no rate limit on the endpoints (or applications) you develop and expose to the users. The only limitation is the quota in case you use the Heroku Free tier.
Paid plans do not have restrictions: Dynos are always running but they do restart every 24hrs anyway (see Heroku Restart policy)
All the dyno sizes listed in the dropdown cost money. Is there some way to guarantee that only my free dyno hours will be used? Thanks!
The Heroku Scheduler Add-On is free when you add it to a Dyno which is using the Free plan.
If you use Hobby the type of the One-Off Dyno will be hobby (which is not free).
The same applies to Standard or Performance, see Heroku One-Off Dyno Type
Apps using standard or performance dyno types will use a standard-1x dyno type in the one-off dyno.
I have an account in heroku. In that account, there are lots of Apps, each app had different kinds of dyno's.
I got a mail saying my free dyno is getting used up and I have to upgrade.
To find out which app has the free dyno is so tedious.
Since I have to fetch the list of dynos for every app using the command heroku ps -a appName.
Is there any command to list all free dynos in my Heroku account?
While logged in visit this link: https://dashboard.heroku.com/account/billing
I have $161 platform credits on heroku from GitHub student pack to spend for one hobby dyno:
The Heroku offer is for one (1) free Hobby Dyno for two years, which will be applied on your invoice as a discount of $7 for a Hobby Dyno.
I already deployed one spring app and changed its dyno to hobby. My question is if there is a way I could deploy second Java app and set it to use the same dyno which is assigned for the first app?
Right now I have one app which has hobby dyno and one app which uses free dyno. I read on the internet and people say that there is only one app allowed for one dyno and Heroku will charge me for the second one but there is also this thread How many apps are allowed on a 'Hobby' Heroku plan? which says that I can have more than one app per hobby dyno.
So what's the truth?
No, you can't run multiple apps on a single dyno.
Heroku's model is to run one app per dyno (and often many dynos for a single app). The question you reference discussed the Hobby plan¹, asking how many dynos can be run per account. Keep in mind that Heroku's model is different from the shared or VPS hosting you might be used to. Dynos don't provide an OS that you can put apps onto; they run apps directly.
¹Technically I don't think this makes a ton of sense since accounts don't have these kinds of tiers. One account can run free dynos, hobby dynos, and professional dynos. But there is a difference between unverified accounts, which can run up to five free dynos, and verified accounts which can run many more.
According to this article on the heroku page it is possible but not recommended.
Heroku post
As far as I know heroku gives you one dyno for free for your app. I uploaded an app but I have no dynos to assign to it.
What should I do?
You need to provide a Procfile so Heroku will know what kind of Dynos you need and how to start your app. Then you'll be able to scale your Dynos.