PrefixLedger
Productivity
Only for iPhone
$5.99 · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Prefix Ledger is a field book for IPv4 host counts and subnet cuts. On the reckon desk, enter an address or CIDR, drag the prefix, and usable hosts, dotted mask, wildcard, and first/last host update as you type. Pin the blocks you reuse. Open the bit split when you want neighboring networks and binary.
The mask atlas highlights the tightest row for the host count you need, with prefix, dotted mask, wildcard, and usable hosts on one table from /0 to /32. The segment ledger takes a base block, then host counts by use, cuts large-to-small on aligned boundaries, and shows what is left. The drill board walks prefix and mask cards one at a time and keeps hits and misses on this phone. Term cards explain CIDR, RFC 3021, and VLSM without sending you to a web page.
Everything you write stays on this iPhone. Planning Folio is a one-time unlock for the full atlas, uncapped ledger pages, and the rest of the drill pack, with restore.
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The developer, Maidlin Macpherson, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Maidlin Macpherson
- Size
- 8.9 MB
- Category
- Productivity
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- PrefixLedger1.0 $5.99
- Copyright
- PrefixLedger©️ 2026