Totally agree. In the US- Real ear verification is actually required by law in several states. Unfortunately the laws about it are a little gray on details, but they at least require it.
Trial periods are also required by law in every state, but the time period varies. When I was in Texas it was 30 days, which is the minimum several states have. A few state offer longer periods.
Close, but definitely not 30% volume. When we fit hearing aids a good audiologist would have asked you if you already wear hearing aids and other questions to know if we need to enable a very specific feature. Each brand calls it something different, but it is generally called “first time user adaptation.” It let’s us set an initial decrease percentage (normally 60-70% of the prescription volume) and we can then set a ‘target time’ of normally about 2 or 3 weeks, maybe 4 or 5 if they are extra old. Then the hearing aids will slowely turn up on their own over the time set. In the end, the person is as 100% volume and they shouldn’t have noticed. You can still do your own personal temp volume changes in the app and it doesn’t interfere with the progressive steps.
A good audiologist will then typically have you come back in 2 weeks, then a month, then at 6 months, then annually or as needed. Each appointment they should be checking several things and asking about the sound and volume levels and such, but specifically we can see where you are adjusting the volume to on average. Most manufacturers let us then just take your average adjustments and apply them to the prescription. So if you are turning it down 3 db on average every day, or if you just cut a little bass or push a little more treble, we can see that and just apply it to be permanent. This is why we encourage people to use the app as much as possible.
Now, all of this is also dependent on the person wearing the hearing aids all day. We get a lot of old people that insist they only need to wear them in very specific situations and then wonder why they never get used to them. It is always fun the first time the person finds out we can see how long the hearing aids are on every day. So they are like “yeah I totally wear them for a few hours every day. 4 or 5 hours, easy” then we tell them they are actually averaging about an hour.
Fun experiment: take your turntable out, place in a large plate with pieces of the shittiest American cheese slices. We are talking kraft single serves. Splay them out, no deeper than one layer thick is needed, but make a full cover of the microwave bed (on top of the plate though. You will make a mess if not). Then you simply cook the shit out of it. You will see the cheese bubble and burn in the microwave wave peaks and you will see cold cheese in the wave troughs.
The Kirkland brand of hearing aids is the same as phonak. It is the same company. Sonova. The biggest two things are oing to be getting them fit by a good audiologist, and picking out a set that fits the needs of the person.