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MobiSystems' dictionaries are sold thought diffent channels. Depending on your device OS, there are a few ways to restore the Premium app:

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Since there have been a lot of inquiries regarding our Dictionary and Translator products, our team decided that it would be a great idea if we can develop a new community, where our users can not only help themselves in a quicker and user-friendly fashion, but assist to other fellow users.

You can also contribute to our general improvements and provide your suggestions and ideas on how we should better not only the features, but the services as well. 

Please feel free to visit our community here: and let us know if you have any questions, issues, or would just like to share your experience and impressions.

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Often, after you have updated your interface or changed your device, the Premium license gets lost and does not automatically renew. 
The simple remedy here would be to manually restore your purchase. You can find the articles on how to do so here:

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At the moment our dictionaries do not provide a backup function. Your data is stored on the device only. When transferring a license to another device your favourites, recent words and folders will not be transferred.
You can manually transfer the favourites from your first device to the next. 

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  • Android:
If your dictionary has the latest update available, you can easily apply it when you go to The Google Play Store and tap on your profile icon at the top right corner of the screen, then tap on "My apps and games" and go to "Updates". The apps that will have the latest updated version, will be present on the list and you would just have to tap "update", or "Update all" so you applies to all of your apps. 

  • iOS: 
If your dictionary has the latest update available, you can easily apply it when you go to the App Store. At the bottom of the screen you will see an "Updates" icon, which most of the time has a red dot on top of it. Tap on the icon and choose the app that can be updated.You can also click on the "Update all" button. 


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This is a billing issue we have been having with Google, and we have resolved it, but will not be releasing the update soon. For the time being, we have attached an .apk file of the fixed version that premium users can download if they are having problems with offline access of their premium features. 


  1. Download the .apk file onto your computer and download File Commander onto your mobile device. 
  2. Once File Commander has been downloaded on your mobile device, press “PC File Transfer” (bottom right option) and flip the switch to “ON” 
  3. Enter the provided link from File Commander into a web browser on your computer and press “Allow” to the PC File Transfer connection request from your mobile device. 
  4. Once you have pressed “Allow” on your mobile device, refresh the web browser tab on you computer, double click “Internal Storage”, choose the folder you want to upload the .apk file to (optional), press “Upload Files”, and choose the .apk file. 
  5. After uploading the file from your computer, find the .apk file in File Commander on your mobile device and click on it. When you click on it, a security notification will pop up, allowing you to go to settings and allow unknown apps to be installed. 
  6. Once you’ve allowed for the app to be installed, press “Install”. Once the installation is done, you can directly open it, or press done.  

The fixed version of Oxford Dictionary of English has been downloaded onto your mobile device. 

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Most digital services of the Oxford University Press (OUP) are gradually migrating to subscription payments. In view of the fact that Oxford University Press’ content is licensed to us, we can no longer offer it for free without some limitations.

The 30-day trial explained

  • In light of the these changes, we included an introductory 30-day trial plan at a very low price. It will give a complete overview of the Premium service, before purchasing the yearly package.
Premium subscription explained

  • Regular content updates - receive updates to the word database, as soon as it is available from the Oxford University Press.
  • Offline mode - access the wealth of the word database anywhere, anytime - no data or internet connection is required.
  • Audio pronunciation – learn words faster by hearing their pronunciations. Available for more than 75,000 entries.
  • Priority support – receive an answer within 24 hours for any app-related support issue.
Free lifetime plan explained

  • Online search and display of the content remains unlimited.
  • App open ads
  • Cached data is stored on the device - all previously opened entries will be available.
  • Color themes, favorites lists and folders, recent words and word sharing are app features vital to proficient and beginner level users and will not be locked behind a paywall.
Subscrption services provided directly from the OUP

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If you acquired the Premium license via an in-app purchase regarding a one-time payment, follow the steps below to activate it:

  • Open device settings, accounts, Google account - make sure to list only the Google account, used for the purchase and make sure you have uninstalled the free version
  • Open Play Store app with that account - Tap on your profile icon
  • Manage apps and device
  • Tap on Manage
  • Tap on Installed>>A drop down menu will appear
  • Tap on Not installed
  • Located the app>>Tap on the check box on the right
  • Tap on the Download icon at the top right corner
If you acquired the Premium license via an in-app subscription payment, follow the steps below to activate it:
  1. On your Android phone or tablet, open the Google Play Store .
  2. Check if you're signed in to the correct Google Account.
  3. Tap on your profile.Tap on Payments and Subscriptions>>Subscriptions.
  4. Select the subscription you want to start again.
  5. Follow onward instructions

If you purchased the Premium Dictionary from our - MobiSystems' - website.
  • Install the Free version of your Dictionary
  • Launch the app > open Settings > Redeem code > paste/enter your 13-digit MobiSystems activation key there 
For one-time payments:

For direct Mobisystems website purchases: 

If you acquired a Premium license via Huawei App Gallery:
1. Uninstall the dictionary app you have at the moment.
2. Make sure you are signed-in the Huawei App Gallery with the account you used for the purchase. 
3. Sign-out and sign-in again. 
4. Download the app from the App Gallery- the device will recongnize your purchase.

More info on how to find and review your Order ID is available here

Disclaimer: If you are using few accounts on your device at the same time, the Premium license may not restore. Please make sure you only have the account used for the purchase on your device as well as Play Store.

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A known issue with users that have some kind of cleaner/optimizer app on the device and it's set to remove "large/big" files automatically.

The dictionary database is one large file that provides offline access so these "optimization" apps directly target it every day. The simple remedy is to change the setting of the cleaner app.

Cleaner apps normally have access to clear Data and Cache as well. You may need to disable clear data if that's done automatically which will also wipe out the offline database of the dictionary.

Samsung's "Device care/Storage booster" & "Files by Google", as well as "Phone Master" are commonly known to cause this.

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  • Our Free dictionaries provide online access to the Premium Dictionary content. The speed at which search results are displayed depends on the quality(strength, speed, latency) of the network connection and the mobile device's specifications.
  • Upgrading your Free license to Premium considerably speeds up the word search by downloading the database on the device.

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Our Dictionaries content is created with the assistance of the world's leading dictionary providers.

We strongly believe that all of our partners have very carefully considered what to include in their dictionaries, be it Oxford, Collins, Houghton Mifflin Harcourt, Elsevier, etc. If you notice an incorrect description, you can write to us at

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Yes, for certain bilingual Oxford Dictionaries we have English audio pronunciations only. Here's a list:

  • German
  • French
  • Russian
  • Spanish
  • Italian
  • Portuguese
  • Bulgarian

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The Oxford Dictionary of English contains very latest vocabulary, with over 350,000 words, phrases and meanings. It is the mobile counterpart of the printed edition of Oxford University Press's ODE.

We have multiple standalone Thesaurus containers. Some are even bundled with our dictionaries. The full list can be accessed in HERE

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If your dictionary database freezes at a certain percentage and does not download fully, you have to clear the App Cache/Storage. Here are the instructions how to do so:

  • Open the Settings of your phone.
  • Tap the Storage heading to open its settings page
  • If your phone runs Android Oreo or earlier, you'll want to open the App Manager settings page.
  • Tap the Other Apps heading to see a list of your installed apps.
  • Find the application you want to clear the cache of and tap its listing.
  • Tap the Clear cache button.
The second way of clearing the App Cache is:
  • Long hold on the app icon
  • Tap on App info
  • Tap on Storage -> Tap on the Clear Data/Clear Cache buttons
    Another reason for the download freezing would be the fact that you may not have enough space in your Storage facility. We would recommend freeing some space on your device so the download could proceed. This could be done from your Device Settings when you tap on the Storage or Memory section or manually.

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The dictionary content of the Oxford Dictionary of English focuses on current English and includes modern meanings and uses of words.

Users commonly confuse our dictionary with the Oxford English Dictionary, which is a historical dictionary and encompassing all the core words and meanings in English over more than 1,000 years.

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The Oxford Dictionary of English has British English audio pronunciation only. 

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Тhe Oxford Dictionary of English contains only British pronunciations. If you would like to hear American English audio pronunciation, you can check out the New Oxford American Dictionary with Audio (more info available here).

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Google releases new versions of android with a year cycle. In process of which developers write some more useful API, methods, classes which are powerful than existing one. So app developers need to use newly written API’s and depricate old methods.

Android 5 and lower are officially no longer supported by Google and that affects our dictionaries as well. So the way around this is to update to Android 6 or higher.

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The maximum number of recent words is 100 for the Oxford Dictionary of English for iOS and 50 for the Oxford Dictionary of English Android.

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