# Sphere2 vs Promethean

The clearest difference is review sentiment: Sphere2 at 100% against Promethean's 18%. Sphere2 also leads on rating (4.0 vs 2.5) and iOS requirement (9.3 vs 15.0). Promethean's advantage is ratings volume (59 vs 1) and device support (3 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Sphere2 holds the better App Store score, 4.0 against 2.5. That said, the two scores are not equally well evidenced: Promethean has 59 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Sphere2's written reviews are positive against 18% of Promethean's.

Sphere2 ships an update every 2 months, Promethean every 4 months. The most recent releases landed on June 11, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Sphere2 | Promethean |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/sphere2/id600783987/reviews)** | [2.5 (59 ratings)](https://appshunter.io/ios/app/promethean/id1447288595/reviews) |
| Number of ratings | 1 | **59** |
| Positive reviews | **100.0% of reviews** | 17.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 36 MB | 66 MB |
| Requires iOS | **9.3** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [AVer Information Inc.](https://appshunter.io/developer/336316718) | [Promethean](https://appshunter.io/developer/321367877) |

## What reviewers say

### Sphere2

[App page](https://appshunter.io/ios/app/sphere2/id600783987)

This app transforms your iPad into a digital whiteboard, integrating live video from a wireless camera with lesson creation tools. Record and instantly upload lessons to the cloud for sharing with students or for review.

**Highlights:** Live video integration with wireless camera, Digital whiteboard for lesson creation, Annotation and drawing tools, Lesson recording, Cloud upload for recorded lessons

**Features:** macOS Compatibility

**In-app purchases:** none


### Promethean

[App page](https://appshunter.io/ios/app/promethean/id1447288595)

This app facilitates classroom collaboration by allowing students and teachers to interact with interactive panels wirelessly. IT administrators can also manage panel enrollment and updates. It offers screen sharing and access to training resources.

**Highlights:** Wireless screen sharing, Panel management for IT admins, Access to training materials, Student-teacher interaction, Panel enrollment and naming

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

**In-app purchases:** none


## Frequently asked questions

### Is Sphere2 free?

Sphere2 is free to download, with no in-app purchases.

### Is Promethean free?

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

### Which has better reviews, Sphere2 or Promethean?

Sphere2 is rated higher. Sphere2 averages 4.0 out of 5 from 1 ratings, while Promethean averages 2.5 from 59 ratings.

### Do Sphere2 or Promethean have ads?

Neither Sphere2 nor Promethean shows ads.

### Which is updated more often, Sphere2 or Promethean?

Sphere2 ships an update every 2 months, and Promethean every 4 months. Most recently, Sphere2 was updated on June 11, 2026 and Promethean on September 30, 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.*