# CIDR vs VisiRing

The clearest difference is update cadence: CIDR at every 3 weeks against VisiRing's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CIDR sells 1 one-off in-app purchase and VisiRing sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

CIDR ships an update every 3 weeks, VisiRing every 2 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | CIDR | VisiRing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cidr/id1564239813/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 23 MB | 110 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [akira ohmachi](https://appshunter.io/developer/1338624340) | [Traxrift Pty Ltd](https://appshunter.io/developer/1716617261) |

## What reviewers say

### 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 |


### VisiRing

[App page](https://appshunter.io/ios/app/visiringqr-code-and-scan-alerts/id6472092651)

**Features:** Apple Wallet

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VisiRing Monthly Pro Plan | $9.99 | per month |
| VisiRing Yearly Pro Plan | $99.99 | per year |


## Frequently asked questions

### Is CIDR free?

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

### Is VisiRing free?

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

### Do CIDR or VisiRing have ads?

Neither CIDR nor VisiRing shows ads.

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

CIDR ships an update every 3 weeks, and VisiRing every 2 months. Most recently, CIDR was updated on November 3, 2026 and VisiRing on October 30, 2026.

---

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