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Trial version in Xamarin.Forms application

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-1

I'm trying to implement trial version for my xamarin.forms application. What is the best way to achieve it?

I had an idea to store a unique ID inside the application with help of Xamarin.Essentials.SecureStorage or inside Xamarin.Essentials.Preferences and compare it with data inside my database at the server, but problem is that all the data getting deleted after each reinstallation of application.

Also, I had an idea to access Xamarin.Essentials.DeviceInfo.Name and verify device name during each application launch, but I'm not sure does this property returns the unique device name during each attempt or not.

I'm new to Xamarin.Forms so I'll appreciate any help. Thanks in advance.

 //using Xamarin.Essentials.Preferences
 var id = Preferences.Get("my_id", string.Empty);
 if (string.IsNullOrWhiteSpace(id))
 
 id = System.Guid.NewGuid().ToString();
 Preferences.Set("my_id", id);
 


 // using Xamarin.Essentials.SecureStorage
 private async void Save()
 
 try
 
 await SecureStorage.SetAsync("bla", "secret-oauth-token- 
 value");
 
 catch (Exception ex)
 
 // Possible that device doesn't support secure storage on 
 device.
 
 

 private async Task<string> Get()
 
 try
 
 return await SecureStorage.GetAsync("bla");
 
 catch (Exception ex)
 
 // Possible that device doesn't support secure storage on 
 device.
 

 return null;
 

c# xamarin xamarin.forms

share|improve this question

asked Mar 23 at 23:52

Илья МуромецИлья Муромец

1

add a comment | 

-1

I'm trying to implement trial version for my xamarin.forms application. What is the best way to achieve it?

I had an idea to store a unique ID inside the application with help of Xamarin.Essentials.SecureStorage or inside Xamarin.Essentials.Preferences and compare it with data inside my database at the server, but problem is that all the data getting deleted after each reinstallation of application.

Also, I had an idea to access Xamarin.Essentials.DeviceInfo.Name and verify device name during each application launch, but I'm not sure does this property returns the unique device name during each attempt or not.

I'm new to Xamarin.Forms so I'll appreciate any help. Thanks in advance.

 //using Xamarin.Essentials.Preferences
 var id = Preferences.Get("my_id", string.Empty);
 if (string.IsNullOrWhiteSpace(id))
 
 id = System.Guid.NewGuid().ToString();
 Preferences.Set("my_id", id);
 


 // using Xamarin.Essentials.SecureStorage
 private async void Save()
 
 try
 
 await SecureStorage.SetAsync("bla", "secret-oauth-token- 
 value");
 
 catch (Exception ex)
 
 // Possible that device doesn't support secure storage on 
 device.
 
 

 private async Task<string> Get()
 
 try
 
 return await SecureStorage.GetAsync("bla");
 
 catch (Exception ex)
 
 // Possible that device doesn't support secure storage on 
 device.
 

 return null;
 

c# xamarin xamarin.forms

share|improve this question

asked Mar 23 at 23:52

Илья МуромецИлья Муромец

1

add a comment | 

I'm trying to implement trial version for my xamarin.forms application. What is the best way to achieve it?

I had an idea to store a unique ID inside the application with help of Xamarin.Essentials.SecureStorage or inside Xamarin.Essentials.Preferences and compare it with data inside my database at the server, but problem is that all the data getting deleted after each reinstallation of application.

Also, I had an idea to access Xamarin.Essentials.DeviceInfo.Name and verify device name during each application launch, but I'm not sure does this property returns the unique device name during each attempt or not.

I'm new to Xamarin.Forms so I'll appreciate any help. Thanks in advance.

 //using Xamarin.Essentials.Preferences
 var id = Preferences.Get("my_id", string.Empty);
 if (string.IsNullOrWhiteSpace(id))
 
 id = System.Guid.NewGuid().ToString();
 Preferences.Set("my_id", id);
 


 // using Xamarin.Essentials.SecureStorage
 private async void Save()
 
 try
 
 await SecureStorage.SetAsync("bla", "secret-oauth-token- 
 value");
 
 catch (Exception ex)
 
 // Possible that device doesn't support secure storage on 
 device.
 
 

 private async Task<string> Get()
 
 try
 
 return await SecureStorage.GetAsync("bla");
 
 catch (Exception ex)
 
 // Possible that device doesn't support secure storage on 
 device.
 

 return null;
 

c# xamarin xamarin.forms

share|improve this question

asked Mar 23 at 23:52

Илья МуромецИлья Муромец

1

 //using Xamarin.Essentials.Preferences
 var id = Preferences.Get("my_id", string.Empty);
 if (string.IsNullOrWhiteSpace(id))
 
 id = System.Guid.NewGuid().ToString();
 Preferences.Set("my_id", id);
 


 // using Xamarin.Essentials.SecureStorage
 private async void Save()
 
 try
 
 await SecureStorage.SetAsync("bla", "secret-oauth-token- 
 value");
 
 catch (Exception ex)
 
 // Possible that device doesn't support secure storage on 
 device.
 
 

 private async Task<string> Get()
 
 try
 
 return await SecureStorage.GetAsync("bla");
 
 catch (Exception ex)
 
 // Possible that device doesn't support secure storage on 
 device.
 

 return null;
 

share|improve this question

asked Mar 23 at 23:52

Илья МуромецИлья Муромец

1

share|improve this question

asked Mar 23 at 23:52

Илья МуромецИлья Муромец

1

asked Mar 23 at 23:52

Илья МуромецИлья Муромец

1

asked Mar 23 at 23:52

Илья МуромецИлья Муромец

1

1 Answer
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Is there some sort of login? Then you can always just store a key on the server that determines if it is paid. And save on the device for offline use. That way you will know if its a paid version. Otherwise publish a lite version seperate on the store

share|improve this answer

answered Mar 24 at 10:53

JP VeldtmanJP Veldtman

10218

add a comment | 

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0

Is there some sort of login? Then you can always just store a key on the server that determines if it is paid. And save on the device for offline use. That way you will know if its a paid version. Otherwise publish a lite version seperate on the store

share|improve this answer

answered Mar 24 at 10:53

JP VeldtmanJP Veldtman

10218

add a comment | 

0

Is there some sort of login? Then you can always just store a key on the server that determines if it is paid. And save on the device for offline use. That way you will know if its a paid version. Otherwise publish a lite version seperate on the store

share|improve this answer

answered Mar 24 at 10:53

JP VeldtmanJP Veldtman

10218

add a comment | 

Is there some sort of login? Then you can always just store a key on the server that determines if it is paid. And save on the device for offline use. That way you will know if its a paid version. Otherwise publish a lite version seperate on the store

share|improve this answer

answered Mar 24 at 10:53

JP VeldtmanJP Veldtman

10218

share|improve this answer

answered Mar 24 at 10:53

JP VeldtmanJP Veldtman

10218

answered Mar 24 at 10:53

JP VeldtmanJP Veldtman

10218

answered Mar 24 at 10:53

JP VeldtmanJP Veldtman

10218