Comparison

TransKey vs UDictionary Translator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

TransKey

Communicate seamlessly in any language without leaving your current app. This keyboard extension translates messages in real-time, both outgoing and incoming, supporting over 100 languages. It preserves capitalization and emojis for a natural conversation flow.

Highlights
  • Translate messages in real-time within any app
  • Translate received messages instantly
  • Supports over 100 languages
  • Automatic source language detection
  • Preserves capitalization and emojis
  • Quick language switching
Features
Read full description

Chat now in any language without switching apps! TransKey translates your messages in real-time inside any app using the keyboard! TransKey is the best chat translator trusted by over 300,000 users and featured on sites like CNET, Product Hunt, Addictive Tips, and more! Over 10,000 5-star App Store reviews! "I didn't think something like this was possible, but I'm happy to say I've been proven wrong. This is a great app to have on your iPhone!" ― WHAT IS IT TransKey is a keyboard extension that translates your messages inside any app (like: WhatsApp, iMessage, Facebook, Twitter X, Email, Chat Apps, SMS, and many more). TransKey also works the other way around. Copy the text you can't understand and TransKey will show you what it means in your native language! ― HOW DOES IT WORK Write what you'd like to say, but before sending your message, tap and hold the Globe key to switch to TransKey. After selecting a target language, tap "Translate text" and watch your message get translated right in the app! If you'd like to translate a message you received, tap and hold it until an option to "Copy" appears. In TransKey tap "Translate copy", and the translation will appear in the same place! Never encounter another language barrier again when communicating with people in other countries! TransKey provides a flawless translation experience right in the messaging app of your choice unlike other translators which interrupt the flow by forcing you to switch to another app. Unlike other translator keyboards, TransKey does not have a keyboard for typing. This allows you to use the keyboard you're most comfortable with, such as the iOS, GBoard, or SwiftKey. ― How to use TransKey: 1. Type something 2. Switch to TransKey keyboard 3. Translate text 3. Tap to insert translated text Without TransKey: 1. Type your text 2. Copy the text 3. Switch to Google Translate 4. Paste your message 5. Translate the message 6. Copy the translated message 7. Exit the translation app 8. Return to your app 9. Paste the translated message ― FEATURES • Translate the last sentence of any text field directly within any app • Translate received messages directly within any app • Fast and accurate translation to and from over 100 languages • Automatic detection of source language • Copy the translation to be used anywhere • Optimized for all iPhone screen sizes in both portrait and landscape Preserves capitalization and emojis Quick language switch, saves time ― POPULAR LANGUAGES Spanish, Japanese, Portuguese, German, Italian, Russian, Dutch, French, Korean, Ukrainian, Arabic, Burmese, Cantonese, Czech, Filipino, Greek, Hebrew, Romanian, Samoan, Swedish, Thai, Tongan, and more. Use Transkey in conjunction with languages learning apps like: Duolingo, Pimsleur, Babbel, HelloTalk, Drops, Busuu, and Rosetta Stone ― NOTICES For accurate real-time translations, TransKey relies on industry leading machine-translation engines such as Google Translate, Microsoft Translate, and Yandex Translate. AI translators are not used in this version. You will need to grant Transkey full access for it to work properly. They keyboard will need to get the text you type so it can send it to the translation service. We do not store anything you translate. See the Privacy Policy. Terms and Conditions: https://transkey.io/terms.pdf Privacy Policy: https://transkey.io/privacy.pdf PAYMENT AND AUTOMATIC RENEWAL TERMS: When first installed TransKey is in trial mode where you get 10 translations per day. For less than 50 cents per day you can upgrade to TransKey Premium, with unlimited high-quality translations. Subscriptions will be charged to your credit card through your Apple ID account and renew automatically unless cancelled at least 24 hours before the end of the period. You will not be able to cancel a subscription during the active period. You can manage your subscriptions in your Account Settings after purchase. ― SUPPORT Contact us by email at hello@transkey.io.

About

UDictionary Translator

Translate text, voice, and images across 108 languages. This app offers a comprehensive dictionary with native examples and pronunciation guides. Premium features include camera translation, a translate keyboard, and offline mode for seamless communication.

Highlights
  • Text translation in 108 languages
  • Voice translation with 47 accents
  • Authoritative built-in dictionaries
  • Camera translation via photo
  • Translate Keyboard for in-app use
  • Offline translation mode
Features
Read full description

** 100,000,000 users across 150 countries. ** U-Dictionary is an efficient translation and dictionary app. Effortlessly translate texts, pictures, or conversations in 108 languages. Get translation instantly whether you're learning a new language or traveling abroad. Help remove your language barriers anytime anywhere. U-Dictionary takes in originally developed dictionaries, Collins COBUILD Advanced Dictionary, WordNet Dictionary, Bilingual Examples, Native Examples, Synonyms, Antonyms, Etymology Dictionary and so on. FEATURES: • Text Translation: Get translation of any pair within 108 languages. • Voice Translation: Translate bilingual conversations in 33 languages, 47 accents. • Authoritative Dictionary: Built-in Concise Dictionary, Collins Advanced Dictionary and WordNet Dictionary. • Perfect English Pronunciation: Native UK (British) and US (American) accent. Listen and Learn. • Native Examples: Authentic sentences collected from famous international news websites. • English Learning: Rich English learning materials • 13 Display Languages: Read in your native language. • Impressive UI: Clear and beautiful interface. Enjoy your journey. Get UDictionary Premium and enjoy: • Camera Translation: Snap to translate without typing by hand. 100 languages are available. • Translate Keyboard: Write and translate instantly within your favorite apps. Chat without borders. • Object Translation: Scan an object and recognize it smartly. Get to know anything around you immediately. • Grammar Check: Enter or paste English text and check it with one click. Enjoy mistake-free writing! • Offline Mode: Free from network limits. Travel abroad without having to pay expensive roaming charges. Desktop/Mobile Web: http://www.u-dictionary.com Articles from Blog: http://udictionaryblog.wordpress.com Contact Us: Connect with us on any of the following Social Media: https://facebook.com/UDictionary/ http://www.youtube.com/c/UDictionary https://plus.google.com/ UDictionary https://twitter.com/Udictionaryforu/ https://instagram.com/udictionaryforu Have queries? Email us at udictionary.help@gmail.com Supported languages for translation: Afrikaans, Albanian, Arabic, Armenian, Azerbaijani, Basque, Belarusian, Bengali, Bosnian, Bulgarian, Catalan, Cebuano, Chichewa, Chinese Simplified, Chinese Traditional, Croatian, Czech, Danish, Dutch, English, Esperanto, Estonian, Filipino, Finnish, French, Galician, Georgian, German, Greek, Gujarati, Haitian Creole, Hausa, Hebrew, Hindi, Hmong, Hungarian, Icelandic, Igbo, Indonesian, Irish, Italian, Japanese, Javanese, Kannada, Kazakh, Khmer, Korean, Lao, Latin, Latvian, Lithuanian, Macedonian, Malagasy, Malay, Malayalam, Maltese, Maori, Marathi, Mongolian, Myanmar (Burmese), Nepali, Norwegian, Persian, Polish, Portuguese, Punjabi, Romanian, Russian, Serbian, Sesotho, Sinhala, Slovak, Slovenian, Somali, Spanish, Sundanese, Swahili, Swedish, Tajik, Tamil, Telugu, Thai, Turkish, Ukrainian, Urdu, Uzbek, Vietnamese, Welsh, Yiddish, Yoruba, Zulu. ----- Auto-Renewable Subscription Terms: * You can cancel the subscription anytime by turning off auto-renewal through your iTunes account settings. This must be done 24 hours before the end of the subscription period to avoid being charged. The cancellation will take effect the day after the last day of the current subscription period, and you will be downgraded to the free service. * Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Privacy Policy: http://inter.youdao.com/cloudfront/vip-pay/privacy.html Terms of Services: http://inter.youdao.com/cloudfront/vip-pay/terms.html

Screenshots

TransKey4 screens
UDictionary Translator4 screens

Verdict

The call

The clearest difference is ads: TransKey at none against UDictionary Translator's shown. TransKey also leads on review sentiment (77% vs 59%). UDictionary Translator's advantage is iOS requirement (11.0 vs 16.0). On price, rating, ratings volume and update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. TransKey sells 3 in-app purchases, starting at $3.99 per 7 days and UDictionary Translator sells 9 in-app purchases, starting at $2.49 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

UDictionary Translator holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 13K and 9.3K respectively. Written reviews complicate that: 77% of TransKey's written reviews are positive against 59% of UDictionary Translator's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

TransKey ships an update every 3 weeks, UDictionary Translator fortnightly. The most recent releases landed on October 20, 2026 and October 19, 2026 respectively.

Scorecard3 real differences · 7 level
TransKey versus UDictionary Translator: the parameters behind the verdict, then further details
ParameterTransKeyUDictionary Translator
PriceFreeFree
Rating4.4 (13K ratings)4.6 (9.3K ratings) — better
Positive reviews76.5% of reviews — better58.8% of reviews
Number of ratings13K — better9.3K
Update frequencyEvery 3 weeksFortnightly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.011.0 — better
Further details — not scored
Size18 MB557 MB
Age rating4++12
DeveloperCourtney & CompanyYoudao (Hong Kong) Limited

Customer experience

TransKey

All ratings12,882 ratings
Positive85.2%
Neutral5.1%
Negative9.7%
Written reviews383 reviews
Positive76.5%
Neutral6.5%
Negative17.0%

UDictionary Translator

All ratings9,261 ratings
Positive90.6%
Neutral3.9%
Negative5.5%
Written reviews956 reviews
Positive58.8%
Neutral8.4%
Negative32.8%

User reviews

TransKey

From 13K App Store ratings

What we love

  • 👍 Convenient keyboard translator
  • 🚀 Instant translations
  • 💡 Supports many languages

Room to improve

  • 🔒 Limited translations per day
  • 💰 Paid subscription required for unlimited translations
  • 🐛 Occasional translation errors

UDictionary Translator

From 9.3K App Store ratings

What we love

  • ⭐ Excellent translation accuracy
  • 🌐 Supports multiple languages
  • 📚 Comprehensive dictionary with examples
  • 🤖 Helpful text-to-speech feature
  • 🔍 Useful scanning and translation capabilities

Room to improve

  • 💰 Excessive paywall and in-app purchases
  • 🐛 Occasional translation failures or errors
  • 🔌 Requires internet connection for full functionality
  • 🕰️ Slow performance and lag at times
  • 📱 Limited features in free version

Bugs and requests

TransKey

Reported bugs

2 issues
  • Keyboard not working on some devices
  • Translations not syncing properly

Requested features

3 requests
  • Unlimited free translations
  • Improved translation accuracy
  • Option to disable character limit

UDictionary Translator

Reported bugs

4 issues
  • Translation unavailable due to 'no internet connection' error when online
  • Scanning feature not working consistently
  • Keyboard translation not functioning properly
  • App crashes or freezes unexpectedly

Requested features

5 requests
  • Offline mode for all translation features
  • Customizable text-to-speech voice options
  • Ability to save favorite words or translations
  • More language support, especially for less common languages
  • Improved grammar and sentence structure analysis

In-app purchases

3 purchases

TransKey

Subscriptions3
  • TransKey Premium (weekly)$3.997 Days
  • TransKey Premium (monthly)2 variants$9.991 Month
  • TransKey Premium (yearly)7 Days trial$49.991 Year
9 purchases

UDictionary Translator

Subscriptions9
  • U Dictionary PRO3 Days trial$2.497 Days
  • U Dictionary PRO-1 week3 Days trial2 variants$4.997 Days
  • U Dictionary PRO-1 month$5.991 Month
Show 6 more
  • U Dictionary PRO$9.991 Month
  • U-Dictionary PRO Monthly1 Month trial$16.991 Month
  • U Dictionary PRO-1 month3 Days trial$16.991 Month
  • U Dictionary PRO-1 year3 Days trial$29.991 Year
  • U Dictionary PRO-1 year3 Days trial$56.991 Year
  • U Dictionary PRO-1 year3 Days trial$69.991 Year

Questions

Is TransKey free?
TransKey is free to download, with in-app purchases available.
Is UDictionary Translator free?
UDictionary Translator is free to download, with in-app purchases available.
Which has better reviews, TransKey or UDictionary Translator?
UDictionary Translator is rated higher. TransKey averages 4.4 out of 5 from 13K ratings, while UDictionary Translator averages 4.6 from 9.3K ratings.
Do TransKey or UDictionary Translator have ads?
UDictionary Translator shows ads; TransKey does not.
Which is updated more often, TransKey or UDictionary Translator?
TransKey ships an update every 3 weeks, and UDictionary Translator fortnightly. Most recently, TransKey was updated on October 20, 2026 and UDictionary Translator on October 19, 2026.

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