calcS16lite vs Countdown Pro +

This is calculator. CalcS16 free -. FreeVersion, (no ad banner). -. Hexadecimal calculation. -. Moving-view is implemented for typing miss. -. Use variable font size for misreading. -. Support metric prefix.( G,M,k,m,u,n,p) -.Support SplitView/SlideView(iPad) Flick to up/down, you will be understand the operation. when you want to g the numeric pad. "S" key is recommended. detail . This is the calculator app with sequential processing. . Mixed calculation of hexadecimal is possible. . if you do not touch screen during 30s. then screen change to clock. . Backgound color is changed by a time.( 0-10:Blue 10-16:Green 16-24:Red) . add metric prefix : "exp" double touching. . convert metric prefix : "=" double touching. please give me advise  for usability improvement.

Countdown Pro – Your Ultimate Event Countdown Tracker Never miss an important day again. Countdown Pro is the beautifully designed, ad-free app that keeps your most meaningful events front and center. Birthdays, anniversaries, holidays, launches, personal milestones — all counted down in style. Features for all users (Basic Tier – One-Time Purchase, Lifetime Access) • Unlimited Countdowns. Create as many countdowns as you want. Custom titles, optional emojis, all-day events, specific times, flexible repeat options, and reminder notifications ensure you're always ready. • iCloud Sync Across Devices. Keep your countdowns synchronised between iPhone and iPad automatically. • Easily switch between Future and Past views to keep track of upcoming events and remember the ones that have passed. • Individual Calendar Timeline View. Pick any countdown and see exactly where it lands on an interactive calendar timeline. Perfect for visualizing your plans at a glance. • Theme Personalization. Choose Light, Dark, or Grey modes, or design your own with precise custom color picking to match your style. • Clean, Modern Design. An intuitive interface with thoughtful details like smart title shortening and emoji support for extra clarity. • Ad-Free Forever. Enjoy a completely distraction-free experience with absolutely no ads ever. • All data stays on device, nothing is collected. Plus Upgrade (Small One-Time upgrade payment, Lifetime Unlock, no subscriptions) Take your countdowns to the next level with the optional Plus upgrade. • Home Screen Widgets. Add your countdowns directly to your Home Screen with beautifully designed, resizable widgets in Small, Medium, and Large sizes that can fit multiple countdowns with customisable colour. Your most important events, always at a glance. • Smart title shortening for clean displays for widgets. • Calendar Import. Seamlessly bring events from your device’s calendar into Countdown Pro. Skip manual entry for birthdays, holidays, and meetings. Simply click the event and its added to your countdown. • All Future Plus Features will be Included. Buy once and enjoy all upcoming Plus-only features for life. No subscriptions. No recurring fees. Why Choose Countdown Pro? Pay Once. Own Forever. Simple, transparent pricing. One-time purchases with lifetime access. • Premium Design. Clean, modern, and highly customizable to suit your taste. • Widget-Ready with Plus upgrade. Unlock advanced Home Screen integration for ultimate convenience. • Privacy First. Your events stay securely on your device. No tracking. No data collecting. Ever. • Thoughtful Details. Smart title shortening for clean displays for widgets. Emoji support. Advanced color picking. • Download Countdown Pro today and make sure every important moment gets the countdown it deserves.