NerdCalc vs CIDR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NerdCalc
Perform calculations across binary, hexadecimal, and decimal number bases simultaneously. Easily switch input modes and see results update instantly for all bases. Supports unsigned and 2's complement for negative numbers, along with arithmetic, logic, and bitwise operations.
- Simultaneous base display
- Switchable input modes
- Unsigned and 2's complement support
- Arithmetic operations
- Logic operations
- Bitwise shifting
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NerdCalc is a binary, hexadecimal and decimal calculator that displays all three number bases at the same time. With NerdCalc, you can quickly switch which base you are inputting and the result of your calculations is always updated for all three bases, no matter what the current input mode. NerdCalc supports both unsigned and 2’s complement, to allow for negative numbers, and can perform basic arithmetic and logic operations as well as bitwise shifting. Enjoy!
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.
Screenshots
Verdict
The clearest difference is in-app purchases: NerdCalc at none against CIDR's 1. NerdCalc also leads on ratings volume (183 vs 1). CIDR's advantage is update cadence (every 3 weeks vs every 19 months) and rating (5.0 vs 4.8). On price, ads and monetization model 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. NerdCalc asks for nothing beyond the download.
CIDR holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: NerdCalc has 183 ratings behind it against 1, so its average is the more settled of the two.
NerdCalc ships an update every 19 months, CIDR every 3 weeks. The most recent releases landed on September 13, 2026 and June 30, 2026 respectively.
| Parameter | NerdCalc | CIDR |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (183 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 183 — better | 1 |
| Update frequency | Every 19 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 0 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Nidal Fakhouri | ao-system, Inc. |
Customer experience
NerdCalc
CIDR
In-app purchases
NerdCalc
No in-app purchases
CIDR
- Remove Ads$1.99
