Hello everyone! My name is Karl, the architect of TouchPal and T+ solution. This is acutally the first time I write blog. Sorry if I didn't follow any general rule. I will do better, just like TouchPal and T+~ Today, my topic is: why T+ is designed as it is... 

Why T+ can be a super fast input solution?

- Innovative design to combine precise and predictive input
T+ leverages new technology innovated by CooTek, which combines precise and predictive input. It makes precise and predictive input possible without any mode switching.

- Rely on word prediction to reduce typing actions
We believe the most efficient way to improve input speed is to reduce the actions you while typing. Word prediction works perfectly in this area which dramatically reduces the times of pressing.

- Thumb-friendly button design to avoid mistyping
We believe helping user to avoid mistyping should be higher priority thing to do instead of helping to correct mistakes, no matter how smart the correction algorithm could be. Thumb-friendly composited button design dramatically reduces the possibility of mistyping. It makes users more confident while typing on soft keyboard.

- Automatically correct mistyping
We also recognize the fact that mistyping is inevitable even on such thumb-friendly button design. Mistyping correction in TouchPal v2 helps a lot in such case to.

Why we choose composited button layout instead of separated?

- Thumb-friendly on small-size touch screen
Each button can be big enough on small touch screen for users to press or slide by thumb, which will reduce mistyping.

- More contents integrated, less switching needed
With composited button design, more contents could be put onto keyboard, like punctuations, accent letters, special letters and digitals. Users can access them simply by sliding on buttons, without switching to another view. It makes input experience much more consistent and smooth.

Why we believe precisely input on composited button by finger movement is better?

- You know exactly what you need to do!
We evaluated the solution of  "support precise input by allowing users to move finger between buttons nearby before releasing". We believe our solution is easier, faster and advanced. The problem is, with that solution, users need to experience the following steps: press down -> see if on right button -> if not, move fingers to correct on -> release. The fact that users need to see if on right button is indeed a penalty, which prevents users typing fast. With T+, you know exactly what you need to do BEFORE action. If you want "E", slide left on E/R button. Such pre-knowledge (along with thumb-friendly buttons) dramatically increases input speed.

- Sliding is much easier than "press -> move to find correct one -> release"
Sliding is actually a very easy action because it just indicates direction.