So it IS possible to add new activity types (such as cycling or tennis)...

Improvement...? Garmin setup the watches to use the apps that are on the app download site. There are MANY options to get on watch that make it very easy to record an activity in the correct mode. without using 'other' and having to change it later.
There are great Hike/Walk, Swim, Elliptical, Lifting apps... so yea I guess improved and gets better by the month.

You are right , but I still would like to add further profiles. In my case I would like to use at least 2 running profiles in order to use different Data Fields in each.

@Gaby_Ciclista: There are already two running activity profiles on the FR235. If you want to be able to add running profiles, try using a model like the FR630 or FR735XT.

Thank you for your help. I have FR235 not FR630 nor FR735XT.

@Gaby_Ciclista: I have both a FR235 and a FR630 in my household. My point is that if you want multiple running profiles, the solution (from Garmin) has long been available; it just involves you as a consumer spending (more) money to satisfy your requirements, instead of enhancing something you have already bought without additional expense on your part. I'm interested in IT solutions to ‘problems’ where functionality (not price) is at the core, and not in fellow consumers being able to ‘save’ money, or get more with what they have, etc.

I don't understand what you mean. I just was asking if someone had made and improvement to add profiles. I don't expect Garmin do.
In addition, from what you say Garmin shouldn't release any firmware update as you buy the device as it is.

Gaby - the 23x/630 are over two years old now, and are pretty much in bug fix only mode, so you likely won't see any new features. Newer devices like the 935 and 645 have a different HW base, which allow for more things. But as others have said, check out the CIQ app store, as there are quite a few things out there. I mentioned one of mine earlier in the thread for walking/hiking, and it's still in the store (I did that when these devices first came out as they didn't have those profiles - and still don't), but there are many others for different things available now.

You also have access to a number of CIQ data fields which allow you to see additional things in the standard run activities, if that would be helpful.

Thank you for your answer. I already know about CIQ app store, I just found this thread and asked.

I just was asking if someone had made and improvement to add profiles. I don't expect Garmin do.

Outside of developing third-party Connect?IQ apps (and making them available to users), nobody other than Garmin can improve the FR235. Tampering with the device's system files to ‘hack’ some unsupported feature (that is properly supported by the manufacturer in other models it sells) is not improving the device.

In addition, from what you say Garmin shouldn't release any firmware update as you buy the device as it is.

Garmin should release firmware updates that remedy unintended defects and inefficiencies that were not part of the design. The manufacturer does not owe it to any user to ‘improve’ the device beyond what was advertised in the model's technical specifications, owner's manual and marketing collateral, although it may do so for its own benefit without regard for anything you or any other user may want, or feel about gaps between what is implemented in the firmware and what the hardware purchased is supposed capable of.

A customer/user should not expect the value proposition (including but not limited to capabilities, performance, and resale value) of a particular device model to increase after purchase over the hardware's useful lifetime.