Welcome to iCham Keyboard – the most optimized, lightweight, and smoothest Cham (Akhar Thrah) keyboard designed for mobile devices and computers.

No need to learn a complex new keyboard layout, iCham brings a natural typing experience like breathing thanks to its powerful core technology platform. Here are the "essences" and how you can master iCham in just 1 minute!

Tap the A/ꨀ button to instantly switch between 2 typing modes:

• A (RUMIX): Type Latin, automatically converts to Akhar Thrah.

• ꨀ (Akhar Thrah): Type traditional Cham script directly.

• Tap the ⚡️ icon on the left to set up your personal text shortcuts.

• Save time on your most frequently used words and phrases!

Tap the C/E key to quickly change the RUMIX typing state: 

• Mode C (Cham): Type Latin to output Akhar Thrah.

• Mode E (English): Keep Latin characters, supports quick variants (e.g., aa → â, ee → é)

iCham understands your typing habits.

• The algorithm analyzes context to provide accurate suggestions.

• The more you type, the smarter it gets!

1. Enable iCham keyboard.

2. Type Cham using Latin characters (Rumix). Use C/E to switch modes.

3. Press Space or punctuation to enjoy the perfect Akhar Thrah text!

Understand the basics and be able to clearly distinguish between concepts.

• A writing system (Alphabet) is a set of characters, letters, and tone marks used to display a language (e.g., Akhar Thrah Cham, Rumi Cham, Vietnamese Quốc ngữ script, Nôm script...).

• The displayed text (Font/Character encoding) is the appearance of text on the screen (based on the font and character encoding. For example: Noto Sans Cham font, Unicode character encoding).

• Input Method/Typing Method is a method of assigning keys on a keyboard (usually an English/QWERTY keyboard) to create special characters or accent marks of that writing system (e.g., Rumix, Telex, VNI, VIQR, MS Vi Layout…).

• Example of typing Vietnamese using the Telex method: if you press Dduwowngf nghieenj (or D0u7o7ng2 nghien65 in VNI), the displayed word will be: đường nghiện.

In short, you can use any input method; the main purpose remains the same: the

displayed word must be in the correct writing system you want to type.

👉  Regarding Rumi, you can refer to the book "Akhar Thrah 7 Harei" guide here: https://nguoicham.com/cdict/akhar-thrah-7-harei

👉  iCham is a Cham keyboard from Latin → Akhar Thrah, using Rumix input method.
For example: typing “adei” + space/enter → ꨀꨕꨬ

👉 iCham does not distinguish between uppercase/lowercase letters. So if you accidentally press the Shift/CapsLock key, it's okay.

8.1. Since iCham uses the default English keyboard layout (QWERTY), you can't type "é" or "â" directly. Instead, we use the "double-tap" trick, I've organized them in the Rumix input method as follows:

8.1.1. “é” = ꨃ and “é” = ◌ꨯꨮꨮ : Type "ee" anywhere. Ex:

- “ésan”, type: eesan → ꨃꨦꩆ

- “jaléng”, type: jaleeng → ꨎꨤꨯꨮꩂ

- “katé”, type: katee → ꨆꨓꨯꨮꨩ 

👉 Special: If “é” = ꨃ is at the beginning of a word, you don't need double "ee", justone "e" works perfectly. Ex:

- “ésan”, just type: esan → ꨃꨦꩆ

- “éng”, just type: eng → ꨃꩂ

8.1.2. "â" has 2 cases:

⁕ Assigned to the 4 deities: ꨊ, ꨐ, ꨗ and ꨟ.

Method: Just type a normal "a".

Ex: type "mata" → ꨟꨓꨩ 

• type "nagar" → ꨗꨈꩉ

• type "ama" → ꨀꨟꨩ 

• type "anakhan" → ꨀꨗꨇꩆ

⁕ "â" for takai kâk ꨲ :

- Type double "aa". Ex: 

• type "aang" → ꨀꨲꩃ
  (if just “ang” → ꨀꩃ)

• type "kraah" → ꨆꨴꨲꩍ
  (if just "krah" → ꨆꨴꩍ)

• type "takraa" → ꨓꨆꨴꨲꨩ 
  (if just "takra" → ꨓꨆꨴꨩ)

- Type “v” for ꨲ anywhere. Ex:

• type “kravh” → ꨆꨴꨲꩍ
  OR “krahv” → ꨆꨴꨲꩍ

• type "amav" → ꨀꨟꨲꨩ
  (vs "ama" → ꨀꨟꨩ )

(Adding "v" freely to add takai ꨲ is just like placing tone marks freely in Vietnamese Telex).

8.2. Add takai ndak for the holy big guys ꨊ,ꨐ,ꨗ,ꨟ → ꨋ,ꨑ,ꨘ,ꨠ by double-typing the last character. Specifically:

8.2.1  "ng" → ꨊ, "ngg" → ꨋ. Ex:

• ngai → ꨊꨰ nggai → ꨋꨰ

• ngat → ꨊꩅ nggat → ꨋꩅ

• anggan → ꨀꨋꩆ

8.2.2  "ny" → ꨐ, "nyy" → ꨑ. Ex:

• nyai → ꨐꨰ
  nyyai → ꨑꨰ

• manyak → ꨟꨐꩀ
  manyyak → ꨟꨑꩀ

8.2.3  "n" → ꨗ, "nn" → ꨘ. Ex:

• nai → ꨗꨰ
  nnai → ꨘꨰ

• anak → ꨀꨗꩀ
  annak → ꨀꨘꩀ

8.2.4  "m" → ꨟ, "mm" → ꨠ. Ex:

• ama → ꨀꨟꨩ
  amma → ꨀꨠꨩ 

• mai → ꨟꨰ
  mmai → ꨠꨰ

• mak → ꨟꩀ
  mmak → ꨠꩀ

• cammat → ꨌꨠꩅ

8.3. Type “s” for ꨧ and ꩋ
Type “ss” or “sh” for ꨦ

👉 If you habitually type "s" for all ꨧ, ꨦ, and ꩋ, iCham will usually correct it. But if it only pops out ꨧ instead of ꨦ, please retype using “ss” or “sh”.

8.4. Type “ppa” or “fa” for ꨛꨩ:
“f” for ꨛ (without balau):

- Type "ppak" (number 4) → ꨛꨩꩀ or "pakk" → ꨛꨩꩀ (type "pak" → ꨚꩀ)

👉 Special: If you habitually type “p” for ꨛ in words like "po", "pok", "campa", iCham still outputs correct ꨛꨯꨮ , ꨛꨯꨩꩀ và ꨌꩌꨛꨩ ꩞

👉 Summary: To be safe, get used to typing “ppa” (or "fa") → ꨛꨩ in all positions, especially when ꨛꨩ  creates a new verb.

8.5. Separately assigning balau ꨩ and takai kik tut takai mâk dalam ꨫ using the "q" key to support the 'long vowel' style. Useful if you want to 'grow a beard' (add ꨩ) wherever you like. Specifically:

8.5.1. Type the "q" key for ꨩ right after a single/double vowel. Ex:

• "cata" → ꨌꨓꨩ
  Type "caqta" or "cqta" → ꨌꨩꨓꨩ 

• type "cek" → ꨌꨮꩀ.
  Type "ceqk" →  ꨌꨮꨩꩀ

• type "muk" → ꨟꨭꩀ, to add ꨩ  just type "muqk" → ꨟꨭꨩꩀ

• type "amaik" → ꨀꨟꨰꩀ, to add ꨩ just type "amaiqk" → ꨀꨟꨰꨩꩀ (add "q" right after "ai")

8.5.2. Type the "q" key for ꨫ right after i. Ex:

• type "takik" → ꨓꨆꨪꩀ, to get ꨫ just type “takiqk” → ꨓꨆꨫꩀ

8.5.3. Freely type the "q" key for balau ꨩ and ꨫ at the end of a word. Ex:

• "mukq" → ꨟꨭꨩꩀ 

• "amaikq" → ꨀꨟꨰꨩꩀ

• "takikq" → ꨓꨆꨫꩀ

👉 Special note: freely combine placing the ꨲ and ꨩ marks using the “q” and “v” keys.

Ex: typing "anavqk" or "anakqv" or "anakvq" will all boom → ꨀꨗꨲꨩꩀ

8.5.4. Also falling under the category of "long vowel" for the /ɔ/ sound, iCham with Rumix mode solves this by double-typing "oo" in "ao" to create "aoo". Specifically:

• "rimaong" → ꨣꨪꨟꨯꨱꩃ (normal)

• "laoong" (double "oo") → ꨤꨱꩃ

8.6. Special Punctuation:

• “//” or “zz” or “xx” → ꩜

• “./.” or “..” → ꩟

• “...” → …

8.7. Shortcuts / Fast Typing:

Alongside the Fast Typing feature (Windows), iCham also supports shortcuts for certain words where their langlikuk (in the Rumi system) is separated from the adjacent letter. For example: 

• cb → ꨌꨝꨩ tp → ꨓꨚꨩ

• mt → ꨟꨓꨩ cwan → ꨌꨥꩆ

• rmwan → ꨣꨟꨥꩆ

• aang k smar duah jlan ktut → ꨀꨲꩃ ꨆꨩ ꨦꨠꩉ ꨕꨶꩍ ꨎꨤꩆ ꨆꨓꨭꩅ

👉 Note: The shortcut might lose its effect if the word contains 2 adjacent characters (in the Rumi system) forming a single consonant (e.g., kh, gh...) or a consonant cluster (kr, kl...) + vowel(s). Ex:

• dr → ꨕꨣꨩ dra → ꨕꨴꨩ

• kr → ꨆꨣꨩ kra → ꨆꨴꨩ

• kl → ꨆꨤꨩ kla → ꨆꨵꨩ 

8.8. The "Consonant Doubling" Technique

You simply need to double-tap the final consonant. This feature prevents your hands from stalling, pushing your typing speed to the absolute maximum. For example:

• type “kaing” → ꨆꨰꩃ ; double the final consonant gg: kaingg → ꨆꨁꨪꩂ

• type “tait” → ꨓꨰꩅ ; double the final consonant tt: taitt → ꨓꨁꨪꩅ

• type “main” → ꨟꨰꩆ ; double the final consonant nn: mainn → ꨟꨁꨪꩆ

• type “maik” → ꨟꨰꩀ ; double the final consonant kk: “maikk” → ꨟꨁꨪꩀ

• type “taah” → ꨓꨲꩍ ; double the final consonant hh: taahh → ꨓꨀꩍ

8.9. The Powerful "Z" Key: The Perfect Word-Breaking Solution

In Cham, typing complex compound words sometimes causes characters to accidentally stick together or the system to misidentify syllables. To completely resolve this issue, iCham has turned the Z key (which does not exist in the Rumix alphabet) into an invisible word-breaking "switch".

• How it works: When you type two adjacent syllables but want to separate them clearly, just insert the letter Z in between. iCham will instantly break the word neatly and smoothly without you having to use the Spacebar. This is a highly effective tool for anyone who wants to type Cham text with extreme accuracy and professionalism. For example:

  • lia → ꨤꨳꨩ
    add Z: liza → ꨤꨪꨀꨩ

  • lii → ꨤꨳꨫ
    add Z: lizi → ꨤꨪꨁꨫ

  • kaing → ꨆꨰꩃ
    kazing → ꨆꨁꨪꩂ

  • tait → ꨓꨰꩅ
    tazit → ꨓꨁꨪꩅ

• Specially, you can combine "consonant doubling" and the "powerful Z key" right within the same word you are typing.

• The "consonant doubling" and "powerful Z" techniques are designed to replace the soft hyphen "-", which used to cost you time switching back and forth between the 123 and ABC keyboards on mobile devices. From now on, you just execute word-breaking directly on the ABC keyboard.

• Both iCham's "consonant doubling" and "powerful Z" solutions work seamlessly on Windows, MacOS, and mobile devices (iOS, Android).

8.10. Character Spamming

You can spam a long string of just a single character, and iCham will render it beautifully and as flawlessly smooth as Ngoc Trinh. For example:

• kkk → ꨆꨆꨆꨩ 

• hhhhh → ꨨꨨꨨꨨꨨꨩ

• aaa → ꨀꨀꨀꨩ

• oooooooooo → ꨅꨅꨅꨅꨅꨅꨅꨅꨅꨅꨩ

8.11. iCham supports final G → ꩁ

8.12. Using the "-" Sign to Isolate Individual Characters

In case you want to write individual characters instead of a complete word, simply add a hyphen "-" (Soft hyphen) right in front of it. This solution is incredibly handy for teaching the Cham script. Specifically: 

• -- → ◌

• -q → ꨩ
  -ii → ꨪ -iii → ꨫ,
  -ei → ꨬ
  -uu → ꨭ
  -e → ꨮ -eee → ꨯꨮ
  -oo → ꨯ

-aii → ꨰ
-ao → ꨯꨱ -aoo → ꨱ
-aa → ꨲ -av → ꨲ
-ia → ꨳ

-rr → ꨴ
-ll → ꨵ
-ua → ꨶ

• -a → ꨀ -i → ꨁ
  -u → ꨂ -ee → ꨃ
  -ai → ꨄ -o → ꨅ

• -k → ꨆ -kh → ꨇ
  -g → ꨈ -gh → ꨉ
  -ng → ꨊ -ngg → ꨋ

• -c → ꨌ -ch → ꨍ
  -j → ꨎ -jh → ꨏ
  -ny → ꨐ -nyy → ꨑ -nj → ꨒ

• -t → ꨓ -th → ꨔ
  -d → ꨕ -dh → ꨖ
  -n → ꨗ -nn → ꨘ -nd → ꨙ

• -p → ꨚ -pp (-f) → ꨛ -ph → ꨜ
  -b → ꨝ -bh → ꨞ
  -m → ꨟ -mm→ꨠ -mb → ꨡ

• -y → ꨢ -r → ꨣ -l → ꨤ
  -w → ꨥ -s → ꨧ -ss → ꨦ
  -sh → ꨦ -h → ꨨ

• -K → ꩀ -G → ꩁ
  -Ng → ꩂ -NG → ꩂ
  -Ngg → ꩃ -NGg → ꩃ -NGG → ꩃ
  -C → ꩄ -T → ꩅ
  -N → ꩆ -P → ꩇ
  -Y → ꩈ -R → ꩉ
  -L → ꩊ -S → ꩋ
  -M → ꩌ -H → ꩍ

👉 Note: iCham with the Rumix typing method is case-insensitive when typing a complete word, but it does apply Capital/Lowercase distinctions when isolating individual characters belonging to the Akhar Matai (final consonants) table in the Akhar Thrah writing system.

👉 Instead of using the hyphen "-", you can replace it with the “z” or “x” key. For example, if you want to display the character ꨆ, you can type “-k”, “zk”, or “xk”, and they will all yield the same exact result → ꨆ.

👉 If you want to use "-" to form a compound word without a space, type (--) twice and you'll get a single hyphen (-). For example: type "buei--baiy" → ꨝꨶꨬ-ꨝꨰꩈ.

The Space key hides 2 incredible features working across all modes:

•  Double Tap: Boom! Instantly type the signature Cham punctuation mark ꩞.

• Long Press: Turn the entire keyboard into an invisible Trackpad to move the cursor and edit text effortlessly.

No need to switch keyboards!

• Tap the 🙂 icon to send thousands of expressive emojis directly from within iCham.";

• iCham automatically saves dozens of your most recently used emojis in the ꨝꨣꨮꨭ ꨗꨫ tab.

No complex switching needed, just use these tap gestures:

• Double Tap: Instantly call up special characters or consonant clusters.

• Long Press: Reveal a popup menu for vowel variants and sub-consonants.

Read the full instructions in the GUIDE file below: