Howbout vs Mozilla Thunderbird
| Howbout | Mozilla Thunderbird | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | Free | Free |
| Open source | No | Yes |
| Platforms | iOS, Android | Android, Linux, macOS, Windows |
| Free plan | Yes | Yes |
| Mobile apps | — | Android |
Both are listed in Best Calendar Apps. On Inferse, Mozilla Thunderbird scores higher on our published basis.