Complement your desk setup with a clean, minimalist clock that displays your subscriber count. Boost your motivation to create better content by watching your YouTube channel's popularity grow right in front of your eyes. The app displays how popular your channel is.

IMPORTANT: starting from August 2019, LaMetric TIME displays the abbreviated subscriber number (e.g., 133,017 → 133k). For channels with fewer than 1,000 subscribers, the exact (non-abbreviated) subscriber count will be shown. 
Source: https://support.google.com/youtube/thread/6543166

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Subscriber Counter for YouTube

Track mentions, tweets, and Twitter followers at a glance.

Action Button (click): last mentions/tweets/followers

Tweets & Followers Counter for Twitter

Displays YouTube video view count. Data is updated once in a minute. 
Features:
* Displays number of video views
* Displays number of likes
* Displays number of comments
* Displays video title
* Notifies about 1, 10, 100, 1000, 10000, 100000 new video views.
* Can display very Very large numbers (hello Gangam Style).

To get started - search for the YouTube video in settings of the app.

(Unofficial app)

Video Views Counter for YouTube

Motivate yourself to be a better content creator by tracking amount of your Twitch followers. The app displays how popular is your channel almost in real-time. Additionally app can notify you when every ten, hundred or thousand followers milestone is reached.

(Unofficial app)

Follower Counter for Twitch

Never miss a stream of your favorite Twitch streamer. If you do live streams – see how your live audience grow, engage with it at the right time.

(Unofficial app)