# PetScan vs Aviation Calculator

The clearest difference is in-app purchases: PetScan at none against Aviation Calculator's 2. PetScan also leads on iOS requirement (12.0 vs 17.0). Aviation Calculator's advantage is update cadence (every 10 days vs every 10 months). On price, ads and device support there is nothing between them.

Both are free to download. Aviation Calculator sells 2 one-off in-app purchases. PetScan asks for nothing beyond the download.

PetScan ships an update every 10 months, Aviation Calculator every 10 days. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PetScan | Aviation Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/petscan/id1450839727/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 11.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 24 MB | 3 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [ATRIA-TRADING](https://appshunter.io/developer/1441232309) | [David Jones](https://appshunter.io/developer/6808813668) |

## What reviewers say

### PetScan

[App page](https://appshunter.io/ios/app/petscan/id1450839727)

This utility app connects to compatible RFID readers for iOS devices to scan and manage pet chip information. It allows users to record scan history, modify chip memory with contact details, and assign pet owner information, including pictures. Data can be exported as spreadsheets and visualized on a map.

**Highlights:** Connects to RFID readers, Initiates scans from iOS device, Records scan history, Modifies RFID chip memory, Assigns pet owner details and photos, Exports data to spreadsheets, Visualizes scan locations on a map

**In-app purchases:** none


### Aviation Calculator

[App page](https://appshunter.io/ios/app/aviation-calculator/id6809196288)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30-day Trial | Free | one-time |
| Full Unlock | $9.99 | one-time |


## Frequently asked questions

### Is PetScan free?

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

### Is Aviation Calculator free?

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

### Do PetScan or Aviation Calculator have ads?

Neither PetScan nor Aviation Calculator shows ads.

### Which is updated more often, PetScan or Aviation Calculator?

PetScan ships an update every 10 months, and Aviation Calculator every 10 days. Most recently, PetScan was updated on October 6, 2026 and Aviation Calculator on October 24, 2026.

---

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