Universal Remote is the best alternative to physical remotes that can change the channel, volume up or down, skip ahead, and pause your TV and Smart TV. It works through wifi so no need to get closure to the TV. With a universal remote app, you can also control, air conditioners, and other thousands of home electronic equipment. The app does not require complex configuration, just simply connecting your mobile and device with the same internet connection.
Top 5 Best Universal Remote Apps:
Universal Remote App: Control your TV, Air conditioner, etc from your phone.
Logitech Harmony Hub: Control Multiple TVs and Streaming Devices.
Yatse: Complete integration of Kodi, Plex, Emby, Jellyfin
Mi Universal Remote App: Control Tons of your electronic devices.
Peel Smart Remote: Combines the universal remote control and TV listings.
Yes, you can use your phone as a remote without an IR Blaster but only in one case. Both of your devices (phone & TV) would be connected with the same WiFi network.