# Protractor Smart vs SeaWarden

The clearest difference is in-app purchases: SeaWarden at none against Protractor Smart's 1. SeaWarden also leads on update cadence (every 4 months vs every 21 months) and iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Protractor Smart sells 1 one-off in-app purchase. SeaWarden asks for nothing beyond the download.

Protractor Smart ships an update every 21 months, SeaWarden every 4 months. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Protractor Smart | SeaWarden |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (242 ratings)](https://appshunter.io/ios/app/protractor-smart/id1076530001/reviews)** | — |
| Number of ratings | **242** | — |
| Positive reviews | 43.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 4 months** |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 47 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [Intelligent Devices Apps Limited](https://appshunter.io/developer/1292185657) |

## What reviewers say

### Protractor Smart

[App page](https://appshunter.io/ios/app/protractor-smart/id1076530001)

This app acts as a smart instrument for measuring angles using your device's camera. It offers two free modes for measuring angles on screen or using a plumb bob for slopes, with an additional premium mode for polygon measurements.

**Highlights:** Camera-based angle measurement, Touch measure mode, Plumb bob measure for slopes, Polygon measurement (premium), Screenshot functionality

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AdBlock - Remove ads | $1.99 | one-time |

**What reviewers like**

- 👍 Useful for measurements
- 👍 Accurate for its purpose
- 👍 Convenient and handy
- 👍 Good for specific tasks (e.g., knife sharpening, stereo mic angles)
- 👍 No excessive charges

**What reviewers complain about**

- 🐛 App freezes/loads indefinitely
- 🐛 Does not launch after updates
- 🐛 Stuck on loading screen
- 🐛 Inaccurate or unstable measurements
- 🐛 Camera quality issues

**Reported bugs**

- App loads indefinitely
- App does not launch after iOS updates
- Stuck on loading screen
- Photo upload not possible in premium version
- Upside-down protractor on iOS

**Requested features**

- Improve camera function (light, zoom)
- Add automatic hold function
- Increase digital readout size
- Add more skins/cosmetics
- Option to remove ads


### SeaWarden

[App page](https://appshunter.io/ios/app/seawarden/id1292185658)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Protractor Smart free?

Protractor Smart is free to download, with in-app purchases available.

### Is SeaWarden free?

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

### Do Protractor Smart or SeaWarden have ads?

Neither Protractor Smart nor SeaWarden shows ads.

### Which is updated more often, Protractor Smart or SeaWarden?

Protractor Smart ships an update every 21 months, and SeaWarden every 4 months. Most recently, Protractor Smart was updated on October 17, 2026 and SeaWarden on October 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.*