CIDR vs About Subnet Mask
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.
About Subnet Mask
This utility tool calculates subnet masks based on IP and subnet inputs. It supports both IP and CIDR formats, determines class-based network numbers, and saves previous calculations for easy access. Users can also check the class of any IP address.
- Subnet mask calculation
- IP and CIDR format support
- Class-based network number calculation
- IP class checking
- Search history
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I believe. My App makes your life more valuable. You will be the greatest better than ever and shine with me. This is a Subnet Calculator. Enter your IP and Subnet. That is all! Subnet mask could write IP format or CIDR format. It also calculates the class-based network number. The search was saved at history and click to lead result. You can check the class of IP. Thank you. :) If there are any incorrect translations, please contact us by email at starlightlab14@gmail.com
Screenshots
Verdict
The clearest difference is in-app purchases: About Subnet Mask at none against CIDR's 1. About Subnet Mask also leads on update cadence (every 9 days vs every 3 weeks). CIDR's advantage is ads (none vs shown). On price, rating, ratings volume 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
Both are free to download. CIDR sells 1 one-off in-app purchase. About Subnet Mask 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 About Subnet Mask. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
CIDR ships an update every 3 weeks, About Subnet Mask every 9 days. The most recent releases landed on June 30, 2026 and September 10, 2026 respectively.
| Parameter | CIDR | About Subnet Mask |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Every 3 weeks | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | ao-system, Inc. | Jaehwa Noh |
Customer experience
CIDR
About Subnet Mask
In-app purchases
CIDR
- Remove Ads$1.99
About Subnet Mask
No in-app purchases
Questions
Is CIDR free?
Is About Subnet Mask free?
Which has better reviews, CIDR or About Subnet Mask?
Do CIDR or About Subnet Mask have ads?
Which is updated more often, CIDR or About Subnet Mask?
Other comparisons
