# Nautical Dog Math Helper vs AVI Camera

The clearest difference is update cadence: Nautical Dog Math Helper at weekly against AVI Camera's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Nautical Dog Math Helper ships an update weekly, AVI Camera every 3 weeks. The most recent releases landed on June 1, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Nautical Dog Math Helper | AVI Camera |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/nautical-dog-math-helper/id6744040776/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free | — |
| Size | 6 MB | 78 MB |
| Requires iOS | **16.6** | 17 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jill Russell](https://appshunter.io/developer/1792014832) | [AVI Electronics](https://appshunter.io/developer/1846673055) |

## What reviewers say

### Nautical Dog Math Helper

[App page](https://appshunter.io/ios/app/nautical-dog-math-helper/id6744040776)

This app simplifies essential maritime calculations for professionals. It offers tools for navigation, maneuvering, and vessel operations, ensuring accuracy and efficiency at sea. Designed for ease of use, it provides critical data even without internet access.

**Highlights:** Rate of Turn (ROT) Calculation, Turn Transfer Computation, RPM and Speed Calculations, Anchor Swing Radius, Distance, Speed, Time (DST), Offline Functionality, Night Mode

**Features:** macOS Compatibility

**In-app purchases:** none


### AVI Camera

[App page](https://appshunter.io/ios/app/avi-camera/id6754100415)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nautical Dog Math Helper free?

Nautical Dog Math Helper is free to download, with no in-app purchases.

### Is AVI Camera free?

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

### Do Nautical Dog Math Helper or AVI Camera have ads?

Neither Nautical Dog Math Helper nor AVI Camera shows ads.

### Which is updated more often, Nautical Dog Math Helper or AVI Camera?

Nautical Dog Math Helper ships an update weekly, and AVI Camera every 3 weeks. Most recently, Nautical Dog Math Helper was updated on June 1, 2026 and AVI Camera on September 19, 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.*