Another option, more expensive than the Zoom but better sound quality, is the Sound Devices MixPre 3M (M stands for Musician's model). While there's a bit of a learning curve, it is designed to do exactly what you are asking for, and doesn't require a computer. You can record multitrack recordings (up to 12 tracks, even though this little thing only has three inputs). It even has a built-in metronome if you use that.
It's a nice portable solution, much smaller than a laptop and simpler than using a DAW (even Reaper, which is reasonably intuitive). The multitrack bit is a little more complicated and you have to read the manual, and beware that the screen is pretty small (as are some of the control buttons). But it's a great solution for something you can put in your coat pocket and easily record wherever you want.
Note that it doesn't have built-in microphones, so you'd need a microphone plus an XLR cable, but you'd need that for recording with a DAW too (plus you'd need an interface for your computer).
Check it out at
https://www.sounddevices.com/products/r ... /mixpre-3mA lot of musicians are using these devices now instead of DAWs, although the one big thing that's not available in this is EQ (equalization). Probably not an issue for your recordings; it does have a low-cut/high pass filter that is useful for cutting out low-frequency noise (foot-tapping on the floor, cars or trucks driving by, Godzilla roars, etc.). If you need EQ, you can always export the tracks to a computer and use a DAW to add it. But you probably won't need it.