camera app that supports taking picture at fixed resolution

I am looking for a camera app that allows me to set the maximum resolution of the pictures being taken. The stock windows 10 camera app always takes a picture at the maximum resolution of the camera (3264x1836) so the resulting files are large. I have to take the pictures and upload them to a website for long term storage but they limit the maximum file size to 4Mb. A large number of the pictures I take are much larger than that. I want the camera app to either automatically shrink the resolution of the picture after it is taken or allow me to set a fixed resolution like 1024x768 or 1280x1024 or 1400x900. I have a surface pro 4 running windows 10 1803. It just updated to 1803 while I have been working on this problem. The stock camera app updated to version 2018.227.30.1000 and doesn't have this functionality either.

Welcome to the forum is this the pc camera or extrenal one its not clear

@Samuria
I am using the built in camera that comes with the Surface Pro 4. The rear camera is 8.0 megapixel.

@Barman58
I have used IrfanView in the past. I know how to use it, however these tablets will be used by people who don't know how to use technology well. Training is not an option as the turn-over rate is too high. I am trying to make this as easy as possible for the user, i.e. take picture, select browse, select picture, click upload. I really need a way to either automate the shrinking process or for the app to just take a lower resolution picture. The camera allows me to change aspect ratios which change the megapixel count for the picture:
6MP 16:9 (3264x1836)
8MP 4:3 (3264x1836)
7.1 MP 3:2 (3264x1836)

All I need is something like:
2.8MP 16:9 (1400x900) or equivalent.

Have you look for other apps for the camera as there are lots of free ones

An issue I helped a client with involved the file format, the RAW shots were averaging 20MB while the more compressed .jpg format had the same shot at between 3MB and 4MB. His camera was automatically saving both, filled up the memory card too quickly. Maybe a selection can be made or trained for .jpg only.

Samuria
I have looked through the windows store using camera app as the search term. I see 445 apps. I see lots of PIP, blenders, add funny things like bunny or cat ears to the picture. Other than camera alternative, I haven't seen any apps that control the camera, other than the windows camera app. What search terms are you using?

@Barman58
Photo Reducer looks nice but it always resets the settings to defaults. Using Photo Reduced I found that the Ideal size for display on 4K TV gives me a reduced size file that still looks good. The default is perfect size for sending via email and the resulting picture is horrible. If it kept its settings between uses I could probably make this work.

@Berton
I am using the built in camera on the surface pro 4. The default camera app doesn't have settings to customize the file format.