Received the Joying UQ130 unit yesterday, and have been playing with it for while, just sitting on a table connected to a DC power supply outside the vehicle.
Some initial impressions:
The screen is bright and gorgeous - Against a dark wallpaper color, the icons look like they would be visible in direct sunlight.
I love having a "real" volume control knob - Wouldn't consider any radio that lacked it.
The included Radio app looks nice, and works OK. The "slide rule" frequency indicator along the top of the screen is a nice touch - and if you touch any part of it, the radio instantly tunes to that frequency - Neat!
However, the Radio app is also burdened with no less than 5 "bands" (2 AM and 3 FM bands). So, for example, in order to tune from a preset station stored on one "band" to another preset on a different "band", you may need to press several extra buttons - which is a needless annoyance. Also, AM and FM presets can't exist on the same screen or "band" - Instead, you have to push extra buttons to switch between them. (Even some of the cheapest car radios on the planet did away with this annoyance, many years ago.)
There doesn't seem to be any way of deleting unused radio presets. So, even if you only have one frequency preset, you'll still see 12 to 18 present buttons holding random frequencies on the screen - which is needless clutter.
Also, the radio's frequency up and down buttons only activate scanning - There is no way to manually bump the frequency up or down, one step at a time. (Many other radios accommodate this by only activating scanning if the Up or Down buttons are pressed for a longer time).
Finally, the radio screen would look even nicer if it had an analog-style signal strength meter (like most home stereos of the 1970's had). There's certainly plenty of room on the screen to include one.
On the included MP3 player app, music files on storage media are displayed in random order. Apparently, there is no way to sort the display by artist name, album title, etc.. Consequently, looking for one specific tune (or even one specific album) among thousands of others is like searching for a needle in a haystack.
Left to run autonomously, the MP3 player app doesn't seem to be able to escape its current folder of MP3 files. So, if every album has its own folder, you get a never-ending repeat of the same album, unless you manually switch to another folder.
Also, on both the Radio and MP3 player apps, there is no way to change the wallpaper - and their current blue-ish colors clash with the ones used on many vehicle dashboards.
Even disconnected from the vehicle battery, the unit remembers a surprising number of settings - Things like equalizer presets, your chosen startup logo, wallpaper, icon arrangements, etc. That's nice for gear-heads and electronics buffs who do a lot of electrical tweaks on their vehicles than involve disconnecting the battery. It doesn't save radio presets or the MP3 file currently being played, however.
Even though Joying's website and owner's manual refer to "SD Card" memory, the memory actually used is microSD. if you buy an ordinary SD Card to use with the unit, you're going to have a lot of fun trying to squeeze it into either of the 2 card slots!
The "keep alive" option is a nice feature. Basically, it allows the unit to remain powered-up for up to any of half a dozen user-specified intervals after the vehicle engine is shut off, thereby avoiding the wait that normally occurs while the unit is booting up. These intervals range from 30 seconds to 2 hours.
I'd also like to see a few intervals that are longer than 2 hours. Since the unit draws approx. half an amp while it's "alive", even a 24 hour duration would only draw approx. 12 amp-hours from the vehicle battery (which is insignificant for most battery sizes). This would eliminate daily start-up delays, while still preserving some battery power over long weekends.
Inclusion of a notepad app would be nice - It would be handy for jotting down license plate numbers, street addresses, etc.
Apparently, the included "Weather" app can not be turned off - and puts a huge blank box on the home screen unless an internet connection is present.
The included Clock app doesn't actually have any way of setting the clock's time - You have to do it in the Date & Time section of the Android OS instead. Also, in 12 hour time format, the clock does not display the first hour of the day properly - i.e., shows "00:06" for 12:06 AM, instead of "12:06".
The equalizer has an adjustment range of +/- 10 somethings - Not sure if it's dBs, percent, bitcoins, furlongs or what...
I'm not impressed with the included "Sygic" navigation app. Unlike Google Maps, it isn't capable of superimposing actual satellite images over the maps, and it constantly puts useless messages in the Android alert box. However, it is capable of working offline, right out of the box.
So far, I really like the look and feel of this unit, and all of my objections are very minor.
Will post some more details after I actually install it...