When comparing Big Skinny bifold wallet vs Woolet, the Slant community recommends Big Skinny bifold wallet for most people. In the question“What are the best slim wallets?” Big Skinny bifold wallet is ranked 4th while Woolet is ranked 11th. The most important reason people chose Big Skinny bifold wallet is:
The nylon micro-fiber material is not only thin and slim but also very light.
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Pros

Pro Extremely light
The nylon micro-fiber material is not only thin and slim but also very light.

Pro Holds 20-25 full-size plastic cards plus bills

Pro Water resistant
The high performance sports nylon line of Big Skinny wallets are water-resistant and tough enough to machine wash regularly. That means you can jump into a swimming pool and or take long bike rides or work extra hours on construction site or garden forever! Big Skinny wallets will just dry out in 1-2 hours from a full soak.

Pro Non-slip interior coating
Proprietary nylon microfiber material is lined with a non-slip interior to help stop valuables from sliding out.
Pro Has an app on Android and iOS
Pro Crowd-GPS
Use other devices to find your wallet.
Pro It is smart
Can be found by Android/iOS app. It has BT transmitter that can be pulled out if you don't like that feature.
Pro Handmade
Best quality on the market. Only selected materials are used.
Pro Slim design
Size: 125 × 87 × 9.9 mm (4.9 × 3.4 × 0.38 inches)
Cons

Con Logo tag
Some wallets have a rubber logo sewn onto the outside front. Because it is thicker than the wallet material, it can catch slightly when transferring the wallet in and out of a tight pocket. It's worth mentioning, even though it hasn't really been a problem for the many years I've had my wallet. Also, the logo is a handy way to mark the front corner, for easy orientation of the wallet when swiping RFID cards.
Con No software development kit (SDK) available
Con Electronics
Kickstarter version doesn't have the best electronics. It can be better in the production version. The electronics can be removed so it can be just a simple and elegant wallet.
Con No app for Linux or Windows phone
