When new iOS version is online, the old version of the app may not work well on the latest iOS.
We will keep updating the app so it works well on latest iOS.
If the app does not work well on latest iOS, please try updating it to the latest version.
Please follow this instruction to update the app manually:
https://support.apple.com/en-us/HT202180
Version number of the app can always be found by these two ways:
1. Tap “gear” button in the app to show the setting page, the version number is shown under the “Contact us” button.
2. Tap “…” button in the recording list page in the app, then “Contact us”. The version number is shown in the email with string like “Recorder Plus: Free Version 3.10.18.3”