Tayasui Sketches

Because beautiful tools make beautiful drawings, we endlessly refined Sketches brushes to create the most realistic drawing and painting tools.
With a modern and lean UI, Sketches is the most versatile and user-friendly sketching app available on Mac.
Features :
Over 20 ultra realistic tools
Incredibly realistic watercolor wet brushes
Smart Brush Editor
Color Eyedropper
Import photos
Stylus support
Sketches interface has been designed from the ground up with styluses in mind and the tools all support pressure.
Sketches more advanced features and tools are available in a Pro, paid bundle :
Layers
Unlimited layers to simplify your task
Export as psd files
List of tools :
- Pen
- Rotring
- Felt Pen
- Pen Brush
- Oil Pastel
- Watercolor Dry and Wet brushes (Pro)
- Acrylic brush
- Airbrush
- Eraser
- Area and Filling tool
- Patterns (Pro)
- Cutter (Pro)
- Smudge tool (Pro)
- Ruler (Pro)

Subscribe to access to premium app features; subscription details are the following:
• Length: weekly, monthly, yearly
• Your payment will be charged to your iTunes Account as soon as you confirm your purchase
• You can manage your subscriptions and turn off auto-renewal from your Account Settings after the purchase
• Your subscription will renew automatically, unless you turn off auto-renew at least 24 hours before the end of the current period
• The cost of renewal will be charged to your account in the 24 hours prior to the end of the current period
• When canceling a subscription, your subscription will stay active until the end of the period. Auto-renewal will be disabled, but the current subscription will not be refunded
• Any unused portion of a free trial period, if offered, will be forfeited when purchasing a subscription
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/