Ok, I got mine day before yesterday and have played with it. Just some observations on the thingie. (I also posted an earlier version of this over on dpreview).
First off, it works, but has a very narrow usage window. I purchased one more out of curiosity and gadget-lust than need, but I do know that the majority of my food photography is typically done with my iPhone either because I'm at a restaurant or because I'm too busy cooking to do a shoot set-up and I'm probably too hungry to waste the time while the food goes cold. The A1 seemed like a nice way to get a few better shots. And to be able to pop my lights with my iPhone just seemed like it might be fun.
I am, however, using an ancient creaky tiny little 5S, which is not listed on the compatibility list. The Godox Photo app loads and works just fine. But, unlike the 7 users, my maximum shutter speed is limited to 1/25s, not 1/45s, which limits usability even more. Ironically, I was constantly fighting overexposure, despite the GN of 8, because I was stuck at iso 40, f/2.2 (fixed), and 1/25s, with nowhere to go and doing macro-distance subjects. You will not be using this for fill flash in the sunshine. If I set the shutter speed in the app to "MIN", I get banding, which I assume doesn't happen with newer phones.
What's frustrating about using the app is that it's translated, so they do odd things like use PWD for "password" everywhere. Bluetooth connection is only through the app, not through the iOS system settings. They also don't tell you in the manual where the Bluetooth connection procedure is documented that the default initial password is "000000" . [It's in the reset procedure section. I was a professional techwriter for 25+ years, this annoys me].
In addition, the app is too general-purpose, and completely ignorant of which lights you're using, so all settings are available at all times, regardless or not of whether you can use them. MULTI (which didn't work for me), LED panel settings, are not grayed out and fully selectable even when not applicable. This isn't a problem in most cases, but being able to swap between Auto and Manual for all lights when you really only have M for everything except the A1 is misleading.
You cannot control any lights in TTL with the app, as dmward explained. So, the "Auto" setting on the A1 is only for the A1. And weirdly, it's not just doing the simple autothyristor thing, but is actually metering with a noticeable pre-flash. There's a definite lag between the preflash and main flash burst with A, so watch for a double pop from the A1. The LED "modeling light" can be turned on/off, but brightness cannot be adjusted, though there is a proportional/50%/100% setting for it, which probably works for the studio strobes with modeling lights, but not the A1. (As I said, not graying out the inapplicable stuff leads you into wondering why settings aren't doing anything).
You can set the A1 to be any group that Godox understands. I've put it in Group E with no problems.
The App does make you swap back and forth between the camera mode and the flash settings page to adjust the lights, which is a bit of a pain, but not horrible. There is a slider on the camera screen that can be used to adjust the A1's power on the fly, but only in A mode. In M mode, it does nothing and for lights other than the A1 it does nothing. There are also two icons on the screen one on the upper left to bring up white balance settings, and one on the right that tells you if the lights have recycled. Neither are particularly intuitive, and the help in the app is your only guide. Good luck with that. You have to tap the gear wheel to get access to the ISO and shutter speed settings. Not one of the best camera apps I've ever used.
The power setting in M is also annoying. The - and + "buttons" only go up and down by 1/3EV, and left/right swiping goes up and down by a full stop. I think I would have preferred a simple slider with the +/- for fine tuning. Also, on a 5S screen, I'm still scrolling, even for just three groups. The universal +/- at the top is not something you can hide if you just want to see the groups. The app definitely needs some refinement.
Also, for the selfie-driven among you, this app is not good for that, as it can't be used with the front camera. Selfies have to be done with the back camera, but the app won't fire unless/until you achieve focus and there's no face-detection AF, only AF by tapping the screen (facepalm).
OK. That's all the confusing not-expected stuff out of the way. The good stuff is that it works. You take a photo with the phone, and your OCF is in it. You can use the LED like a flashlight as well as a modelling light or main light. You can use the A1's flash like a flash. You can easily use a remote Godox flash (I tested my TT350-O and my TT685-C as slaves--both worked fine, although obviously TTL and HSS aren't in the equation from the iPhone). I have no X1T, so couldn't test how the app works used in concert with one.
The buttons and hardware controls on the A1, unlike the app, are very intuitive. You can set group, channel, mode and FEC/power level very easily. It's very easy to check the group, mode, power setting, channel, Bluetooth connection status, and battery level. The USB charging/firmware upgrade port is USB3 and they include a cable with a USB-A connector on the other end.
And yes, you can save off your lighting/group settings using the Export function and load them using the Import function. And you have to associate one of the photos the app has access to with the preset you've exported before you save it, so you have a visual reminder of what those settings were for. Too bad you can't use TTL and I don't see any HSS on/off setting. [facepalm].
I also found a secondary use for the A1 which is that if it's not connected to the iPhone via Bluetooth, it can still be used as an in-hand master/remote to pop the lights (say, if you were using a handheld light meter--the A1 has what I presume is a sync-in 2.5mm port). I also guess that you could use it on a different channel with an X1R as a remote shutter release if you had an on-camera X1T as your flash master.
As a slave, it works as expected. Granted, I was stupid and had my master set the group to M and HSS and kept wondering why I was only seeing flash in the top of the frame (headdesk). Once I took it out of HSS, sync was fine.
One other thing I found amusing is that the Flashpoint M1 comes in a white box with slightly upscale packaging. Almost aping Apple. But there's no case for the unit in the box. And Adorama stuffed it into a giant UPS express box to mail it to me 3-day for free.
Overall, probably of too limited use/too expensive for what it is for most folks, even the iPhone-only photographers, but a fun toy. An interesting first try, and if Apple ever figures out how to increase sync speed of the electronic shutter, or Godox manages to build the functionality into their transmitters or has the X1T talk do the camera communication with the app so that TTL and HSS with Godox lights is functional from the app settings, then it becomes very interesting. But maybe not quite there, yet.
Curious to see what firmware and app upgrades will bring.
In the meantime, I can snap food shots with my iPhone with a little OCF, and that's all I was hoping for.