This problem could have multiple causes. Since we are talking about the Note 3 (a powerful phone, though) the most simple and logical explanation is that the application is lacking compatibility with the phone's operating system (Android 4.X). Note 3 is capable of running all the applications on the Google Play Store. I have also encountered situations when known apps (eg. Facebook) had problems running on the Galaxy S3, even if the phone was more than capable of running it. I recommend sending an email to the developer in order to explain this situation. You can use the following address to get in touch with him: smartviewer.n@gmail.com
Alternatively, use the REPORT window and describe what you were doing. The report will be sent to the developer.