# NerdCalc vs CIDR

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.

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.

## The numbers

| Metric | NerdCalc | CIDR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (183 ratings)](https://appshunter.io/ios/app/nerdcalc/id432781819/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cidr/id1564239813/reviews)** |
| Number of ratings | **183** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 0 MB | 23 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nidal Fakhouri](https://appshunter.io/developer/432780820) | [ao-system, Inc.](https://appshunter.io/developer/1338624340) |

## What reviewers say

### NerdCalc

[App page](https://appshunter.io/ios/app/nerdcalc/id432781819)

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.

**Highlights:** Simultaneous base display, Switchable input modes, Unsigned and 2's complement support, Arithmetic operations, Logic operations, Bitwise shifting

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### CIDR

[App page](https://appshunter.io/ios/app/cidr/id1564239813)

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.

**Highlights:** IP address range calculation, Subnet mask to CIDR conversion, IPv4 prefix display, Number of address ranges, Bit notation display, Quick reference table

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is NerdCalc free?

NerdCalc is free to download, with no in-app purchases.

### Is CIDR free?

CIDR is free to download, with in-app purchases available.

### Which has better reviews, NerdCalc or CIDR?

CIDR is rated higher. NerdCalc averages 4.8 out of 5 from 183 ratings, while CIDR averages 5.0 from 1 ratings.

### Do NerdCalc or CIDR have ads?

Neither NerdCalc nor CIDR shows ads.

### Which is updated more often, NerdCalc or CIDR?

NerdCalc ships an update every 19 months, and CIDR every 3 weeks. Most recently, NerdCalc was updated on September 13, 2026 and CIDR on June 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*