SubnetBuddy vs History Lib

SubnetBuddy is a fast, offline subnet calculator and network planning tool built for IT professionals, network engineers, students, and anyone studying for their CCNA, CompTIA Network+, or just needs to crunch CIDR notation on the fly. No internet required. No ads. No account needed. Just open the app and start calculating. SUBNET CALCULATOR • Enter any IP address and CIDR prefix (e.g. 192.168.1.0/24) • Instantly see network address, broadcast address, first and last usable host • View total hosts, usable hosts, and wildcard mask • Get the next sequential subnet with one tap • Supports all prefix lengths from /0 to /32 MASK CONVERTER • Convert between CIDR notation, dotted decimal, and binary • Enter a prefix length and see all three formats instantly • Quick-reference for common subnet masks • Perfect for exam prep and on-the-job lookups VLAN PLANNER • Plan multiple VLANs with custom names and sizes • Set a base network and SubnetBuddy calculates non-overlapping subnets for each VLAN • See network range, gateway, CIDR, and host count per VLAN • Great for designing office networks, lab environments, and homework assignments IP VISUALIZER • Enter a CIDR block and see a visual map of the IP address space • Color-coded grid shows used vs. available addresses • Instantly understand how big (or small) your subnet really is • Tap any cell to see the full IP address TERMINAL-STYLE DESIGN • Dark theme with VibeCMD's signature hacker-green aesthetic • Monospace fonts and command-line inspired interface • Clean, distraction-free layout built for speed • Easy on the eyes during late-night study sessions WORKS COMPLETELY OFFLINE • Zero network calls — all calculations happen on-device • No account required — open and use immediately • No data collection — your network plans stay on your phone • Lightning fast — results appear as you type BUILT FOR REAL PEOPLE • IT professionals doing quick subnet math on-site • Students studying for CCNA, Network+, or any networking exam • Homelab enthusiasts planning their network segments • DevOps engineers carving up VPC address spaces • Anyone who's tired of Googling "what is /22 in dotted decimal" SubnetBuddy is a utility tool for network address calculations. It does not connect to or scan any networks.

This is a niche app designed to store and preserve Safari browser history. ===== Why Develop This App ===== As an Apple user, I only use Safari as my browser. One day, in an effort to thoroughly clean up the junk in Safari browser, I decided to export all the history records of Safari and then delete all the data of Safari at once... OK, it's all taken care of perfectly. However... When I opened Safari again and tried to import the history, I was completely shocked by the result: The import function in macOS always loses some data, and the import function in iOS/iPadOS is even worse, only importing the records from the last month! This is unacceptable for me, who heavily uses the browser. I'm not someone who likes to take notes; instead, I simply browse through the browser history when needed. However, the Apple ecosystem has explicitly refused to import all of my records. I naturally couldn't change Apple, so I simply took matters into my own hands and created this app. ===== Functions and Features ===== • Import the Safari browser history and it doesn't matter how long it is. • Supports export in multiple formats, and can be easily transferred to other devices or browsers at will. • Support the encryption of the export in HistoryLib’s own format, providing an additional layer of protection for your privacy. • Data can be fully synchronized with iCloud automatically. For multiple Apple devices, only one modification is needed, and there is no need for manual import or export. • Supports completely offline operation. The complete code is all open source on GitHub. Your privacy will always be secure. ===== Suitable Scenarios ===== • Dislike the privacy protection of the existing browsers and cloud synchronization • Don't want others to see the history records, but don't want to delete them all directly • Have exported good history records locally, but there is no suitable tool to view them, and don't want to import them back into the browser • ... [This app is open-source on GitHub under the MIT license] https://github.com/SJasonP/HistoryLib