CIDR vs CIDR Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CIDR
This utility calculates IP address ranges from an IP address and subnet mask. It supports IPv4 calculations, including prefix display, address range counts, and bit notation. Useful for quick CIDR notation checks and subnet mask conversions.
- IP address range calculation
- Subnet mask to CIDR conversion
- IPv4 prefix display
- Number of address ranges
- Bit notation display
- Quick reference table
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Calculate the IP address range from the IP address and subnet mask. It can be used to calculate IPv4 addresses, including prefix display, number of address ranges, and bit notation. CIDR calculation, when you want to check CIDR notation quickly. To convert subnet mask to CIDR notation. It can also be used as a quick reference table for subnet masks. Bit notation is also available, so it is suitable for learning IPv4.
CIDR Calc
Calculate subnet details, including IP addresses, masks, and reverse masks, using CIDR notation. Generate and share lists of subnets and hosts within the next higher octet. This tool simplifies network calculations for IT professionals and students.
- Subnet calculation
- IP address display
- Mask and reverse mask
- Shareable subnet lists
- Host calculation
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Displays subnet, IP addresses, mask, and reverse mask based on IP and CIDR notation. Generates shareable list of all subnets and hosts in next higher octet.
Screenshots
Verdict
The clearest difference is in-app purchases: CIDR Calc at none against CIDR's 1. CIDR's advantage is update cadence (every 3 weeks vs every 19 months). On price, rating, ratings volume and ads 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
Both are free to download. CIDR sells 1 one-off in-app purchase. CIDR Calc asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for CIDR against 5.0 for CIDR Calc. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
CIDR ships an update every 3 weeks, CIDR Calc every 19 months. Both last shipped on November 3, 2026.
| Parameter | CIDR | CIDR Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Every 3 weeks — better | Every 19 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Vision Pro |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 23 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | akira ohmachi | Paul Smicker |
Customer experience
CIDR
CIDR Calc
In-app purchases
CIDR
- Remove Ads$1.99
CIDR Calc
No in-app purchases
