VoicePing is the only Walkie Talkie App in the KaiOS store and is available for free usage for 80 million KaiOS users. Users can talk in any of the public channels and even hear voice messages in real time. VoicePing for KaiOS supports the entire range of KaiOS devices like Nokia 8110 4G to CAT B35.
KaiOS is a simple, light weight operating system designed for 4G enabled feature phones. It is not a complex smartphone operating system, but it does offer some smartphone experiences through light weight versions of popular applications such as the Google Assistant and Google Maps.
You can also download games and apps via the KaiStore.