Bitcoin Mempool Monitor

Watch the next block form

Only for Mac

$4.99

Mac

Watch Bitcoin transactions enter the mempool and see how fees, transaction size and available block space influence the estimated next block. See what may enter Bitcoin’s next block. Bitcoin Mempool Monitor turns the stream of unconfirmed Bitcoin transactions into a clear, structured visualization. Instead of presenting thousands of transactions as a dense mosaic, the app focuses on one central question: Which transactions are most likely to enter the next block? WATCH THE NEXT BLOCK TAKE SHAPE The estimated next block updates as the Bitcoin mempool changes. See: New transactions enter the mempool High-fee transactions move into the estimated block Available block space fill in real time The current inclusion threshold change Transactions wait below the estimated cutoff Replacement transactions update through RBF UNDERSTAND TRANSACTION SELECTION Bitcoin transactions are not processed in a simple first-in, first-out queue. Miners generally select transactions according to their fee rate, size, dependencies and the available block weight. Bitcoin Mempool Monitor presents this process in a structured and approachable way. The estimated next block shows: Transaction count Used and available block weight Estimated transaction fees Current fee-rate range Transactions arriving per minute Time elapsed since the previous block NO FALSE COUNTDOWN Bitcoin blocks do not arrive on a fixed schedule. The app displays the time elapsed since the previous block, but it does not pretend to know when the next block will be found. Mining is probabilistic, and the next valid block may appear at any moment. EXPLORE REAL TRANSACTIONS Select a transaction to inspect its: Transaction ID Fee and fee rate Size and virtual size Input and output values RBF status Current estimated position All information is read-only and based on public Bitcoin network data. BUILT FOR LEARNING Contextual explanations describe the mempool, block weight, transaction fees, RBF and the process miners use to construct candidate blocks. Bitcoin Mempool Monitor does not contain a wallet, does not initiate transactions and never requests private keys or recovery phrases. PLEASE NOTE The displayed next block is an estimate based on the transactions visible to the selected data source. Individual Bitcoin nodes and mining pools may see different transactions and may apply different selection policies. The app cannot predict the exact contents or arrival time of the next mined block. = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - Part of The Beaver Tools — a collection of focused Mac utilities.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

The developer, Christian Ahrweiler, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Christian Ahrweiler
    Size
    2 MB
    Category
    Education
    Compatibility
    Requires macOS 14.0 or later.
    • Mac
      Requires macOS 14.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2025 by Chris Ahrweiler
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

    More by Christian Ahrweiler