Is it possible to give half a star? – Tone generator Review

Would be a great app if they didn't make the manual input of tones only available by paying. It seems the slider is also purposefully calibrated with low accuracy as to miss certain tones, thereby stressing the need to pay for the manual input option. Would give a better review, but they would have to pay $0.99 for that option.
Review by -seraph- on Tone generator.