When comparing Multiling O Keyboard vs MessagEase, the Slant community recommends MessagEase for most people. In the question“What are the best Android soft keyboards?” MessagEase is ranked 7th while Multiling O Keyboard is ranked 8th. The most important reason people chose MessagEase is:
Your hand(s) will memorize the gestures and soon you will reduce the information displayed (some make it blank). The number of combinations of the gestures allows a direct access to nearly all usual symbols (punctuation, accented letters, etc.).
Specs
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Pros
Pro Customizable
Complete control over Appearance, keyboard size, position etc
Pro Lightweight
Few hundred kbs in size. Perfect for low-end phone with limited storage.
Pro No internet permission
The users data is much safer.
Pro Supports more than 200 languages
Pro Fast input, quick full access to all symbols
Your hand(s) will memorize the gestures and soon you will reduce the information displayed (some make it blank). The number of combinations of the gestures allows a direct access to nearly all usual symbols (punctuation, accented letters, etc.).
Pro You can type almost everything a regular keyboard can
This keyboard has up, down, right, left, copy, paste, select all, hide keyboard, tab. And they're all one swipe on the main screen. And you can easily type things that usually require either a bunch of shifts, or are impossible, like ôǒöòó¿¡°[]{}1¹2²3³.
Pro Support of clipboard, macros, editing keys
Macros: define frequently typed sentences associated to an abbreviation. Type the abbreviation, the macro is listed in the word prediction area.
Tap-Drag-Go: on a gesture (hold on Num key, Tap), it displays icons on which you can move (Drag) and release (Go). It inserts a predefined sentence, like macros, but with a faster, more visual interface.
Clipboard: cut, copy, paste, select all Android commands available with a swipe. It has a memory of the last 10 clipboard contents.
Editing keys: swiping on the space bar allows to move the caret left, right, up or down. Swipe and return move by word. Swipe and return on the backspace key allows to delete a word on left or right.
Pro Highly customizable
You can choose your color (can depend on language), the rounding of keys, the position of characters, the size and disposition of the keyboard, etc.
Pro Supports lot of keyboard layouts and dictionaries
Keyboard layouts are adapted to each language, as they are based on the frequency of letters in this language.
Beside, it allows reconfiguration of the keys to better fit your preferences.
It also has good word prediction / correction.
You can configure several keyboard configurations (advice: better stick to one, the one you will use the most, as speed is based on hand memory) and several dictionaries, and you can switch with a simple gesture.
Pro Easy to type with one hand
Because the buttons are big, it's easy to type with one hand while holding it. That is, unless you have a giant phone or tablet. There aren't many keyboards that you can easily type with one hand unless it's lying flat.
Pro Exists on lot of devices
Including iPhone, smartwatches, car navigation systems, etc.
Cons
Con outdated
no updates since '20
Con Complicated
Hard to use backward bad Sayles features.
Con Steep learning curve
Customization requires bit of learning
Con Prediction and gesture typing is not exceptional
Con Breaks habits, needs some training
It is not a keyboard for everybody, it needs some efforts and training to be efficient.
Still, it is relatively intuitive: my 11 years old son used it without asking first how to use it.
It as a comprehensive help, lot of settings, and has a companion game to train in a playful way.