# Green Wave Solar vs Shift Calendar

The clearest difference is in-app purchases: Green Wave Solar at none against Shift Calendar's 10. Green Wave Solar also leads on iOS requirement (13.4 vs 17.0). Shift Calendar's advantage is update cadence (weekly vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Shift Calendar sells 10 in-app purchases, starting at $0.99 per 7 days. Green Wave Solar asks for nothing beyond the download.

Green Wave Solar ships an update every 3 weeks, Shift Calendar weekly. The most recent releases landed on October 3, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Green Wave Solar | Shift Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/shift-calendar-shiftpro/id6736994383/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 87.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 56 MB | 165 MB |
| Requires iOS | **13.4** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AHASOLAR TECHNOLOGIES LIMITED](https://appshunter.io/developer/1632224285) | [Andrea Agostino Cataldo](https://appshunter.io/developer/1774275152) |

## What reviewers say

### Green Wave Solar

[App page](https://appshunter.io/ios/app/green-wave-solar/id1547421817)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shift Calendar

[App page](https://appshunter.io/ios/app/shift-calendar-shiftpro/id6736994383)

Organize your work schedule with a customizable calendar designed for shift workers. Track absences, monitor work hours with detailed statistics, and generate exportable reports. Features a dark mode for comfortable viewing.

**Highlights:** Customized shift scheduling, Complete absence management, Advanced reporting, Exportable reports, Dark mode

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $0.99 | per 7 days |
| Monthly | $1.99 | per month |
| Weekly | $1.99 | per 7 days |
| Monthly | $3.99 | per month |
| Monthly | $3.99 | per month |
| Annual | $12.99 | per year |
| Annual | $19.99 | per year |
| Annual | $19.99 | per year |
| Annual | $19.99 | per year |
| Annual | $24.99 | per year |

**What reviewers like**

- 👍 User-friendly interface
- 🚀 Efficient shift planning
- 📊 Detailed reporting
- 🎨 Customizable calendar
- 💻 Intuitive and easy to use

**What reviewers complain about**

- 🔧 Limited category customization

**Requested features**

- Widget support
- Larger font size for exports


## Frequently asked questions

### Is Green Wave Solar free?

Green Wave Solar is free to download, with no in-app purchases.

### Is Shift Calendar free?

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

### Do Green Wave Solar or Shift Calendar have ads?

Neither Green Wave Solar nor Shift Calendar shows ads.

### Which is updated more often, Green Wave Solar or Shift Calendar?

Green Wave Solar ships an update every 3 weeks, and Shift Calendar weekly. Most recently, Green Wave Solar was updated on October 3, 2026 and Shift Calendar on October 20, 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.*