# Sensor vs Boat Calculator

The clearest difference is in-app purchases: Sensor at none against Boat Calculator's 1. Boat Calculator's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Boat Calculator sells 1 one-off in-app purchase. Sensor asks for nothing beyond the download.

Sensor ships an update every 2 months, Boat Calculator every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sensor | Boat Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/sensor-app/id1466399692/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 48 MB | 3 MB |
| Requires iOS | 27.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Volker Schmitt](https://appshunter.io/developer/1466399691) | [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858) |

## What reviewers say

### Sensor

[App page](https://appshunter.io/ios/app/sensor-app/id1466399692)

Access and utilize all your device's sensors with this comprehensive tool. Explore GPS, gyroscope, acceleration, magnetometer, altimeter, and attitude data for various applications and research.

**Highlights:** Access GPS for precise location, Utilize gyroscope for orientation, Measure acceleration and movement, Detect magnetic fields with magnetometer, Access altimeter and pressure data, Monitor device attitude (roll, pitch, yaw)

**Features:** Apple Watch app

**In-app purchases:** none


### Boat Calculator

[App page](https://appshunter.io/ios/app/boat-calculator-marine-engine/id6762048442)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Calculators | $12.99 | one-time |


## Frequently asked questions

### Is Sensor free?

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

### Is Boat Calculator free?

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

### Do Sensor or Boat Calculator have ads?

Sensor shows ads; Boat Calculator does not.

### Which is updated more often, Sensor or Boat Calculator?

Sensor ships an update every 2 months, and Boat Calculator every 3 weeks. Most recently, Sensor was updated on October 24, 2026 and Boat Calculator on October 25, 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.*