# SOS Remote vs Canvas Teacher

The clearest difference is review sentiment: SOS Remote at 100% against Canvas Teacher's 26%. SOS Remote also leads on rating (5.0 vs 4.6). Canvas Teacher's advantage is update cadence (every 4 weeks vs every 8 months) and ratings volume (96K vs 3). 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.

SOS Remote holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Canvas Teacher has 96K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of SOS Remote's written reviews are positive against 26% of Canvas Teacher's.

SOS Remote ships an update every 8 months, Canvas Teacher every 4 weeks. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | SOS Remote | Canvas Teacher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sos-remote/id476665630/reviews)** | [4.6 (96K ratings)](https://appshunter.io/ios/app/canvas-teacher/id1257834464/reviews) |
| Number of ratings | 3 | **96K** |
| Positive reviews | **100.0% of reviews** | 26.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 weeks** |
| Monetization | Free | Free |
| Size | 4 MB | 183 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NOAA Science On a Sphere](https://appshunter.io/developer/476665633) | [Instructure Inc.](https://appshunter.io/developer/418441198) |

## What reviewers say

### SOS Remote

[App page](https://appshunter.io/ios/app/sos-remote/id476665630)

Control a Science On a Sphere® system with your mobile device. Adjust sphere orientation, manage datasets, and enhance presentations with interactive features. Ideal for educational settings.

**Highlights:** Adjust sphere orientation, Control dataset playback, Load presentation playlists, Search and browse data catalog, View dataset descriptions, Create presentation playlists, Draw on and zoom datasets, Dynamically adjust dataset layers

**In-app purchases:** none


### Canvas Teacher

[App page](https://appshunter.io/ios/app/canvas-teacher/id1257834464)

This mobile companion helps educators grade assignments, provide feedback, and manage classes efficiently from anywhere. It allows for annotation, audio/video feedback, and communication with students. The app streamlines class management tasks for teachers on the go.

**Highlights:** Mobile grading with SpeedGrader, Annotate assignments, Audio/video feedback, Post class announcements, Manage Inbox and messages, Update assignment content

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to navigate
- 🚀 Convenient for grading on the go
- 🚀 Helpful for contacting students
- 👍 Good look and feel

**What reviewers complain about**

- 🐛 Buggy and unreliable
- 🐛 Missing key features from desktop version
- 🐛 Slow and glitchy performance
- 🐛 Inconsistent behavior across devices
- 🐛 Loses annotations and comments

**Reported bugs**

- App crashes frequently
- Inability to save grades and annotations
- Inconsistent behavior when rotating device
- Issues with loading student submissions
- Problems with syncing data between app and web version

**Requested features**

- Add ability to access and edit modules
- Improve grading tools and functionality
- Allow customization of notification settings
- Enhance integration with other platforms
- Improve stability and reliability


## Frequently asked questions

### Is SOS Remote free?

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

### Is Canvas Teacher free?

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

### Which has better reviews, SOS Remote or Canvas Teacher?

SOS Remote is rated higher. SOS Remote averages 5.0 out of 5 from 3 ratings, while Canvas Teacher averages 4.6 from 96K ratings.

### Do SOS Remote or Canvas Teacher have ads?

Neither SOS Remote nor Canvas Teacher shows ads.

### Which is updated more often, SOS Remote or Canvas Teacher?

SOS Remote ships an update every 8 months, and Canvas Teacher every 4 weeks. Most recently, SOS Remote was updated on November 1, 2026 and Canvas Teacher 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.*