Comparison

Water vs Subnet CIDR Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Water

Features
Read full description

Knowing the water content of natural gases is essential to the design and operation of production, dehydration, and transmission systems. Water may condense in production and gathering systems. Condensed water may form water slugs which will tend to decrease flow efficiency and increase the pressure drop in a line. Presence of free water in pipeline systems may also cause corrosion. If carbon dioxide and/or hydrogen sulphide are present, the gases may form carbonic acid and sulphurous acid respectively if dissolved in water. Water content calculations are based on a method developed by Campbell. The method applies the standard physical chemistry equations and the Eykman Molecular Refraction (EMR) combination rules. For water content calculations the approach here uses fugacity coefficient as one of the key factors.

About

Subnet CIDR Pro

This app is a fast and accurate IPv4 subnet calculator and visual planner for network professionals and students. It offers instant calculations, VLSM planning, and a comprehensive CIDR reference, all while operating offline with no ads or tracking.

Highlights
  • Instant IPv4 & CIDR calculation
  • Visual VLSM subnet planner
  • Complete CIDR & mask reference
  • Offline operation
  • No ads or tracking
  • One-tap copying
Features
Read full description

Subnet CIDR Pro is a focused, offline-first network calculator and VLSM planner built for network engineers, sysadmins, homelab users, and IT students. From quick /30 interface checks to full multi-VLAN allocation plans, get accurate IPv4 subnetting and address tooling directly on your iPhone and iPad—with zero tracking, zero ads, and 100% local calculation. IPv4 & CIDR CALCULATOR • Full Range Support: Calculate any prefix from /0 to /32 • Essential Telemetry: Network, broadcast, subnet mask, wildcard mask, and usable host ranges • Host Capacity: Instant breakdown of total addresses vs. usable host capacity • Modern Link Handling: Full support for /31 point-to-point links (RFC 3021) and /32 host routes • Binary Inspection: Visualize network vs. host bits in clear binary layout • Mask Conversion: Seamless conversion between CIDR prefixes, subnet masks, and wildcard masks • One-Tap Copy: Copy individual values or complete formatted network summaries VLSM NETWORK PLANNING • Requirement-Driven Allocation: Subnet a parent IPv4 block based on exact host requirements • VLAN & Naming: Assign custom network labels and VLAN IDs per subnet • Growth Headroom: Configurable growth reserve percentage per allocation • Gateway Reservation: Optional automatic reservation for default gateway addresses • Space Optimization: View allocated CIDRs alongside remaining unallocated blocks • Overflow Warnings: Instant alerts when requirements exceed parent network capacity ADDRESS TOOLS & IP MATH • Subnet Compare: Test two subnets for containment, overlap, equality, or isolation • IP Membership: Verify instantly whether an IPv4 address belongs to a target network • Range to CIDR: Convert arbitrary start/end IP ranges into minimal exact CIDR blocks • Subnet Splitting: Break down any network into equal-sized child subnets • Supernetting: Summarize adjacent or overlapping subnets into clean aggregation blocks PROJECT WORKSPACE & EXPORT • Project History: Save named planning projects, reopen, rename, or duplicate anytime • Auto-Save: Automatically preserves your current planning draft • Data Export: Export complete subnet plans and available address blocks as CSV • Clipboard Sharing: One-tap copy for formatted plain-text documentation CIDR QUICK REFERENCE TABLE • Interactive reference matrix for all prefixes (/0 to /32) • Searchable by prefix, dotted-decimal mask, wildcard mask, or usable host count • Fast reference copying for switch and firewall configuration DESIGNED FOR iOS & iPadOS • High-contrast dark interface tailored for server rooms and night operations • Adaptive iPad workspace: side-by-side inputs, live results, and wide allocation tables • Localized in 13 languages: English, Simplified & Traditional Chinese, German, French, Japanese, Korean, Italian, Spanish, Brazilian Portuguese, Arabic, Dutch, and Turkish 100% OFFLINE & PRIVATE • Calculations run purely on your device • No account required, no telemetry SDKs, no ads, and no in-app purchases Terms of Use: https://subnet.opshome.run/terms/ Privacy Policy: https://subnet.opshome.run/privacy/ Support: https://subnet.opshome.run/support/

Screenshots

Water4 screens
Subnet CIDR Pro4 screens

Verdict

The call

The clearest difference is update cadence: Subnet CIDR Pro at fortnightly against Water's every 59 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Water ships an update every 59 months, Subnet CIDR Pro fortnightly. The most recent releases landed on October 27, 2026 and October 21, 2026 respectively.

Scorecard1 real difference · 8 level
Water versus Subnet CIDR Pro: the parameters behind the verdict, then further details
ParameterWaterSubnet CIDR Pro
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 59 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better16.0
Further details — not scored
Size1 MB2 MB
Age rating17+4+
DeveloperBjarne Berge超 张

In-app purchases

None

Water

No in-app purchases

None

Subnet CIDR Pro

No in-app purchases

Questions

Is Water free?
Water is free to download, with no in-app purchases.
Is Subnet CIDR Pro free?
Subnet CIDR Pro is free to download, with no in-app purchases.
Do Water or Subnet CIDR Pro have ads?
Neither Water nor Subnet CIDR Pro shows ads.
Which is updated more often, Water or Subnet CIDR Pro?
Water ships an update every 59 months, and Subnet CIDR Pro fortnightly. Most recently, Water was updated on October 27, 2026 and Subnet CIDR Pro on October 21, 2026.

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