# OpenSolar vs Terros

The clearest difference is rating: OpenSolar at 4.4 against Terros's 3.8. OpenSolar also leads on in-app purchases (none vs 4) and iOS requirement (15.7 vs 17.0). Terros's advantage is update cadence (every 4 days vs every 6 weeks) and ratings volume (99 vs 10). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Terros sells 4 in-app purchases, starting at $29.99 per month. OpenSolar asks for nothing beyond the download.

OpenSolar holds the better App Store score, 4.4 against 3.8. That said, the two scores are not equally well evidenced: Terros has 99 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 45% of OpenSolar's written reviews are positive against 41% of Terros's.

OpenSolar ships an update every 6 weeks, Terros every 4 days. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | OpenSolar | Terros |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (10 ratings)](https://appshunter.io/ios/app/opensolar/id1410085935/reviews)** | [3.8 (99 ratings)](https://appshunter.io/ios/app/terros/id6444381162/reviews) |
| Number of ratings | 10 | **99** |
| Positive reviews | **45.5% of reviews** | 41.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#135** |
| Size | 216 MB | 112 MB |
| Requires iOS | **15.7** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [OpenSolar Pty Ltd](https://appshunter.io/developer/1340033321) | [Terros, Inc.](https://appshunter.io/developer/1530302605) |

## What reviewers say

### OpenSolar

[App page](https://appshunter.io/ios/app/opensolar/id1410085935)

This free application provides a comprehensive solution for designing and selling solar energy systems. It offers end-to-end functionality for solar professionals.

**Highlights:** End-to-end solar design, Sales application, Free to use, Comprehensive functionality

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

**In-app purchases:** none


### Terros

[App page](https://appshunter.io/ios/app/terros/id6444381162)

**Currently charting:** #135 Top Grossing · Business (US App Store)

This sales platform empowers individuals, teams, and companies in the door-to-door industry with advanced tools to boost sales performance. It offers features for opportunity identification, lead generation, and in-field work gamification to enhance daily sales efficiency.

**Highlights:** Opportunity identification and validation, Lead generation tools, Area management capabilities, In-field work gamification, Team and company leaderboards, Team management features, CRM API integration

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Canvass Pro Monthly | $29.99 | per month |
| Canvass Max Monthly | $49.99 | per month |
| Canvass Pro Annual | $269.99 | per year |
| Canvass Max Annual | $479.00 | per year |


## Frequently asked questions

### Is OpenSolar free?

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

### Is Terros free?

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

### Which has better reviews, OpenSolar or Terros?

OpenSolar is rated higher. OpenSolar averages 4.4 out of 5 from 10 ratings, while Terros averages 3.8 from 99 ratings.

### Do OpenSolar or Terros have ads?

Neither OpenSolar nor Terros shows ads.

### Which is updated more often, OpenSolar or Terros?

OpenSolar ships an update every 6 weeks, and Terros every 4 days. Most recently, OpenSolar was updated on October 7, 2026 and Terros on October 14, 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.*