Black Keys vs x36
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Black Keys
This app provides multilingual keyboards for typing in unsupported languages and the International Phonetic Alphabet (IPA). It features a dark mode for eye comfort and supports a wide range of languages, including Arabic, Amharic, and Khmer. Tutorials are available for complex typing methods.
- Multilingual keyboard support
- IPA typing
- Dark mode
- Support for many languages
- Tutorial videos
- Long-press for hidden letters
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Black Keys, multilingual keyboards, for unsupported languages and typing IPA (International Phonetic Alphabet). Black mode is simple but awesome and good for your eyes. Check your language in this list and download: *IPA: IPA full and English IPA (new design and full of letters) *Arabic group: Dari, Pashto,Sorani Kurdish, Uyghur *Need to install font group: Amharic, Burmese, Coptic,N'ko,Tifinagh *Others: Khmer, Inuktitut, Georgian, Armenian, Sinhala, Lao, Kazakh, Nepali, Bangla, Gurmukhi, Malayalam, Gujarati, Kannada, Oriya, Telugu. *NOTE: -Some keyboard have longPress to popup some hidden letters: Amharic, Dari, Pashto, Sorani Kurdish. Please take your time to practice much from beginning to understand how to use or check our video tutorials from app -Burmese and Sinhala use smart combination to help you type faster, please check tutorial video from app. -Deprecated languages: Persian, Syriac (move to swipekeys app) If your keyboard miss some letters, or need to improve or you need to add your languages,please contact us on Facebook: https://www.facebook.com/BlackKeyboards
x36
This app offers a powerful scientific and engineering calculator with advanced features like programmability, multiple number bases, and statistical functions. It emulates the functionality of calculators from the 70s and 80s, providing over 100 functions for complex calculations.
- Programmability with 1000 steps
- Trigonometric functions with selectable units
- Statistical functions and linear regression
- Four number bases (Decimal, Hex, Octal, Binary)
- Metric-English conversions
- Fraction operations
- Over 100 functions
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This calculator is packed with features common to any good scientific and engineering calculator from the 70's and 80's including: Programability. Can store up to 1000 steps. Includes label, jump, loop and subroutine capability. -Common mathematical operations including square roots, powers, reciprocals, and logarithmic functions. -Up to 15 levels of parenthesis. -A full set of trigonometric functions working with user selectable units of degrees, radians, and gradians. Also performs polar-rectangular and degrees-minutes-seconds - decimal degree conversions. -Common physical constants such as the speed of light, gravitational constant and Avogadro's number. -Single and double variable statistical functions including linear regression. 10 memory storage locations. -Metric-English and English metric conversions. -Four number bases (Decimal, Hexadecimal, Octal, and Binary). -Bit logic operations. -Three display modes (floating point, scientific, and engineering) with user adjustable number of digits displayed. -Can perform operations with fractions! Over 100 functions in all! AND NO ADS!
Screenshots
Verdict
The clearest difference is review sentiment: x36 at 100% against Black Keys's 54%. x36 also leads on rating (5.0 vs 3.4). Black Keys's advantage is monetization model (free vs paid) and update cadence (fortnightly vs every 2 months). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Black Keys costs $0.99 and x36 $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
x36 holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: Black Keys has 27 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 54% of Black Keys's written reviews are positive against 100% of x36's.
Black Keys ships an update fortnightly, x36 every 2 months. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.
| Parameter | Black Keys | x36 |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 3.4 (27 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 53.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 27 — better | 1 |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 35 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | LE SANG | Carl Cook |
Customer experience
Black Keys
x36
Bugs and requests
Black Keys
Reported bugs
53 issues- Keyboard takes up more space over time
- Eastern font lost after update
- Syriac-Eastern font shows as Estrangelo
- Myanmar Error Unicode and Zawgyi
- Cannot add vowels on alphabets
Show 48 moreShow fewer
- Language change button inconsistent
- App took money, no service
- Won't do Normal QWERTY
- Cannot change case, numbers, or common symbols
- Font typing error in iPhone 6 plus
- Cannot see Myanmar font on iPhone
- Typing review of letters falls under finger
- Semi-shift does not work in Twitter
- Space between words gets messed up with semi-shift
- Kazakh missing lowercase 'a'
- Keyboard appears and disappears when clicking a field
- Some Sinhala letters missing
- App closes automatically while typing some letters
- Font missing for Nepalese language
- Every time writing something it shows specific characters
- White mode doesn't work
- Bug with diacritical markers in Notes/Email apps
- Keys seem incomplete for Khmer
- Keys are too small and slow for Khmer
- Keys show as ... when shifting cases
- Key layout moves around when switching cases
- Response when hitting key is slow for Khmer
- Small additional characters hidden under finger
- Cannot find '?' and '!' on new keyboard
- Two keys for Burmese alphabet 'ဘ'
- Zawgyi update misplaced some characters
- Shift key button deleted in Burmese (zawgyi) after iOS 8.1 update
- Cannot see shift key to switch
- Long pressing not accurate on small keypad
- Dots at the foot of character vary
- Cannot find dot to place above characters
- Cannot use Myanmar font properly after updating
- Cannot see Myanmar font on YouTube
- Missing some previous characters in Myanmar Zawgyi font
- Keyboard theme not beautiful anymore
- Space button has a delay
- Keyboard layout not standard for iPad
- Not all keys included in Burmese Unicode Keyboard
- Shift key seems left out in Burmese Unicode Keyboard
- Crashing when attempting to place diacritical markers
- Black background too dark
- No space between keys
- Not working after adding to keyboard list
- Don't work and show keyboard after adding
- A bit of delay when first changing to numpad
- No 'Pa' for word 'Pa'
- Keyboard size issue
- Syriac Estrangelo replaced by Serto after iOS 9 update
Requested features
22 requests- Fix Nestorian style font
- Add vowels on alphabets
- Improve language change button consistency
- Add custom keyboard creation/customization
- Add Latin Extended keyboard
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- Add multiple signs for prenasalization
- Add original theme option
- Add Text-To-Speech function for IPA
- Improve keyboard design and layout
- Add sound for keys
- Add space between keys
- Improve Persian keyboard layout for iPad
- Add white background option
- Fix missing characters in Sinhala keyboard
- Fix missing characters in Nepalese language
- Fix missing characters in Kazakh keyboard
- Fix missing characters in Khmer keyboard
- Fix missing characters in Burmese Unicode Keyboard
- Fix missing characters in Myanmar Zawgyi font
- Add IPA characters for 'm, ɱ, ɳ, ɲ, ŋ, and ɴ'
- Add combining diacritics to Latin Extended keyboard
- Add IPA characters for 'ⁿ'
x36
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Black Keys
No in-app purchases
x36
No in-app purchases
