Yes, simply use this Kinalta trial.
There is a limit on storage, around 4GB. Everything else is exactly like the paid version. The trial will work for 30 days.

No, you do not have to. You have two options.
You may pay 12 months upfront for a big discount.
That being said, if you prefer no long commitment, it is great too: You may pay month to month.
Note, this is not a subscription. At the end of each period, Kinalta will show you an alert in the app. Click on "Setup" and purchase your next month. If you do not want to pay, no problem, no complicated subscription cancellation, simply ignore the alert. Your account will expire, and you will lose access to your files.
You can easily reactivate your account for the next six months, your files will still be there waiting for you, within this grace period.

- All subscriptions and options paid upfront annually (12 months), or month to month (no pre-authorization to cancel).
- Month to month plan is not a subscription. you are invoiced every month. easy cancellation simply requires ignoring the invoice. no payment and your account is cancelled.
- Unlimited users subject to fair use (100 or so per account)

Unlike other services, you always pay upfront. So there is nothing to cancel.
We leave you the choice of commitment. You may choose to pay twelve months (a year) upfront, and you cannot cancel afterward. In exchange we give you a very deep discount of 40%. Or you may choose to pay one month at a time, upfront. Nothing to cancel either. At the end of your pre-paid month, simply ignore the app request to purchase your next month, and you are done. We keep it very simple.