# Sonar Go vs Spearcast

The clearest difference is update cadence: Spearcast at every 2 weeks against Sonar Go's monthly. Spearcast also leads on iOS requirement (15.1 vs 17.4). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Sonar Go ships an update monthly, Spearcast every 2 weeks. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Sonar Go | Spearcast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/spearcast/id6760902608/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 55 MB | 44 MB |
| Requires iOS | 17.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sonar Telematics S A S](https://appshunter.io/developer/767702450) | [Rohan de Launey](https://appshunter.io/developer/1886713096) |

## What reviewers say

### Sonar Go

[App page](https://appshunter.io/ios/app/sonar-go-connected-vehicle/id767702447)

Monitor vehicles in real-time with GPS tracking, trip history, and diagnostic information. Receive alerts for events like speeding or geofence breaches, and store important car documents digitally.

**Highlights:** Real-time GPS tracking, Trip history analysis, Vehicle diagnostic data, Driving behavior monitoring, Customizable alerts, Digital document storage, Safe parking geofencing

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

**In-app purchases:** none


### Spearcast

[App page](https://appshunter.io/ios/app/spearcast/id6760902608)

Log spearfishing dives quickly and gain insights into ocean conditions and their impact on success. Automatically capture environmental data and analyze trends to improve your skills. Share reports and keep your dive history private.

**Highlights:** Effortless dive logging, Automatic ocean/weather data capture, Analyze dive success based on conditions, Share visibility reports, Private dive history

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sonar Go free?

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

### Is Spearcast free?

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

### Do Sonar Go or Spearcast have ads?

Neither Sonar Go nor Spearcast shows ads.

### Which is updated more often, Sonar Go or Spearcast?

Sonar Go ships an update monthly, and Spearcast every 2 weeks. Most recently, Sonar Go was updated on November 1, 2026 and Spearcast on November 5, 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.*