Security is an all-important factor, especially for journalists. While both the iOS and Android app stores are closely curated by Apple and Google, respectively, malware can sneak onto your device via email and text message links and attachments.
This makes performing a security audit on your device, either by the devices’ built-in capabilities or by running antivirus and anti-malware apps on your device or computer, all-important. I suggest running such audits weekly, or even daily if possible.