Looking for a simple way to see the iOS volume level at all times? VolumeStatus 2 provides this functionality on jailbroken devices running iOS 7. Once installed, an estimate of volume will appear in a status bar icon.
No need to tap the volume buttons, or even see the volume heads up display. Toggles under Settings -> VolumeStatus make it possible to hide the HUD completely. This means the status bar becomes the go-to place to see volume level information.
Volume level is represented by four lines on the status bar icon, which gives a pretty good approximation of loudness. Of course, a toggle to completely disable or enable the tweak is also provided. New features are in the works for future releases.
VolumeStatus 2 is available on Cydia from the BigBoss repository for free. Jailbreak iOS 7.1.x with Pangu to start customizing iOS. Check here for instructions on how to jailbreak iOS 7.0.x with evasi0n 7. You can also find out how to purchase and install Cydia tweaks with this guide.