Do I Need A Vinometer In My Winemaking Kit

This was a cheap item but it doesn't do what I'm after in my winemaking. It's a pretty neat little gadget though, and if you're testing dry wines, I think it be pretty reliable.
If you have a local brew shop or can pick up used equipment do so, for everything else you can't find, I've listed them below.
Affiliate Links
Vinometer - amzn.to/3PJCSon
Wine Making Supplies
6 Gallon Primary Fermenter - amzn.to/45hYca7
Bung - amzn.to/3LPEY4V
Airlock - amzn.to/3ZGrUVc
Mixing Spoon - amzn.to/3to6pN2
5 Gallon Carboy - amzn.to/3RMag0m
Carboy Cleaning Brush - amzn.to/48R090u
Auto Siphon - amzn.to/3RR4b2V
Campden Tablets (potassium metabisulfite) - amzn.to/48HiBbO
Campden Tablets (sodium metabisulfite) - amzn.to/48H3Rd2
StarSan Sanitizer - amzn.to/3LPDzvb
#9 Corks - amzn.to/48HT9Ti
Bottle Filler - amzn.to/3ZJzDSj
Wine Thief - amzn.to/3PJX8WN
Graduated Cylinder - amzn.to/3teZKo1
Wine Hydrometer - amzn.to/3thk9ZU
Hand Corker - amzn.to/46fuyE1
Floor Corker - amzn.to/3tjJy50
Wine Bottles (Clear) - amzn.to/45iT3i0
Wine Bottles (Green) - amzn.to/3RGdanm
Wine Bottles (Blue) - amzn.to/46ySfH5
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[@gotomt]

Bought one of these- worked as expected. It’s a good sanity check to make sure you did the math correctly. All of $8. Why not??

[@QualityHomeWinemaking]

I definitely am using it to check my math, I was hoping it would do sweetened wine.