# Cannon Downriggers vs Troll Master Depth Calculator

The clearest difference is review sentiment: Troll Master Depth Calculator at 66% against Cannon Downriggers's 0%. Troll Master Depth Calculator also leads on rating (3.8 vs 2.5) and update cadence (monthly vs every 18 months). Cannon Downriggers's advantage is in-app purchases (none vs 3). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Troll Master Depth Calculator sells 3 in-app purchases, starting at $4.99 per month. Cannon Downriggers asks for nothing beyond the download.

Troll Master Depth Calculator holds the better App Store score, 3.8 against 2.5. That said, the two scores are not equally well evidenced: Troll Master Depth Calculator has 73 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 0% of Cannon Downriggers's written reviews are positive against 66% of Troll Master Depth Calculator's.

Cannon Downriggers ships an update every 18 months, Troll Master Depth Calculator monthly. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Cannon Downriggers | Troll Master Depth Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (13 ratings)](https://appshunter.io/ios/app/cannon-downriggers/id1432658912/reviews) | **[3.8 (73 ratings)](https://appshunter.io/ios/app/troll-master-depth-calculator/id1459946758/reviews)** |
| Number of ratings | 13 | **73** |
| Positive reviews | 0.0% of reviews | **65.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 26 MB | 51 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Johnson Outdoors Inc.](https://appshunter.io/developer/775931463) | [Trevor Lewis](https://appshunter.io/developer/1459946757) |

## What reviewers say

### Cannon Downriggers

[App page](https://appshunter.io/ios/app/cannon-downriggers/id1432658912)

Control your fishing downriggers remotely from your mobile device. Monitor trolling data, manage multiple units, and update your downrigger software with ease. Enjoy full command of your fishing gear from anywhere on your boat.

**Highlights:** Remote downrigger control, Trolling data monitoring, Software updates, Network view of multiple units, Control of speed and line settings

**Features:** Vision Pro support

**In-app purchases:** none


### Troll Master Depth Calculator

[App page](https://appshunter.io/ios/app/troll-master-depth-calculator/id1459946758)

This app calculates the precise trolling depth of your fishing lure based on various factors like line, lure type, and speed. It also allows for the creation of custom dive charts for at-home planning. Ideal for anglers targeting a wide range of freshwater and saltwater species.

**Highlights:** Calculate trolling depth, Create custom dive charts, Select line, lure, and weights, Adjust factors like speed and length, Physics-based calculations, On-water testing verified

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Annual Subscription | $19.99 | per year |
| Lifetime Purchase | $49.99 | one-time |

**What reviewers like**

- 👍 Easy to use and convenient
- 🎯 Accurate depth calculations
- 🎣 Great for trolling
- 💡 Constantly adding new lures
- 🚀 Fast and efficient

**What reviewers complain about**

- 👎 Limited lure selection
- 🐛 Buggy in certain configurations
- 🤷‍♂️ Inaccurate dive curves
- ❌ Does not work in some configurations
- 🚫 Upgrade doesn't always unlock features

**Reported bugs**

- App does not work
- No results found even with inputs
- Upgrade not working
- Dive curves are not accurate
- App throws errors

**Requested features**

- Add saltwater trolling lures
- Include Yo-Zuri, MagBay, Ilander lures
- Update and add new baits
- Add leadcore trolling option
- More lure selection from major manufacturers


## Frequently asked questions

### Is Cannon Downriggers free?

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

### Is Troll Master Depth Calculator free?

Troll Master Depth Calculator is free to download, with in-app purchases available.

### Which has better reviews, Cannon Downriggers or Troll Master Depth Calculator?

Troll Master Depth Calculator is rated higher. Cannon Downriggers averages 2.5 out of 5 from 13 ratings, while Troll Master Depth Calculator averages 3.8 from 73 ratings.

### Do Cannon Downriggers or Troll Master Depth Calculator have ads?

Neither Cannon Downriggers nor Troll Master Depth Calculator shows ads.

### Which is updated more often, Cannon Downriggers or Troll Master Depth Calculator?

Cannon Downriggers ships an update every 18 months, and Troll Master Depth Calculator monthly. Most recently, Cannon Downriggers was updated on November 2, 2026 and Troll Master Depth Calculator on November 6, 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.*