# SolarCalc ROI vs DeviceShelf

The clearest difference is in-app purchases: SolarCalc ROI at none against DeviceShelf's 3. DeviceShelf's advantage is update cadence (every 2 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. DeviceShelf sells 3 one-off in-app purchases. SolarCalc ROI asks for nothing beyond the download.

SolarCalc ROI ships an update every 2 weeks, DeviceShelf every 2 days. The most recent releases landed on October 19, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | SolarCalc ROI | DeviceShelf |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 22 MB | 27 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Muhammed Celik](https://appshunter.io/developer/1885092121) | [Christof Müller](https://appshunter.io/developer/987990115) |

## What reviewers say

### SolarCalc ROI

[App page](https://appshunter.io/ios/app/solarcalc-roi/id6762481553)

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

**In-app purchases:** none


### DeviceShelf

[App page](https://appshunter.io/ios/app/deviceshelf/id6779666567)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DeviceShelf Mobile | $17.99 | one-time |
| DeviceShelf Complete Upgrade | $34.99 | one-time |
| DeviceShelf Complete | $49.99 | one-time |


## Frequently asked questions

### Is SolarCalc ROI free?

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

### Is DeviceShelf free?

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

### Do SolarCalc ROI or DeviceShelf have ads?

Neither SolarCalc ROI nor DeviceShelf shows ads.

### Which is updated more often, SolarCalc ROI or DeviceShelf?

SolarCalc ROI ships an update every 2 weeks, and DeviceShelf every 2 days. Most recently, SolarCalc ROI was updated on October 19, 2026 and DeviceShelf on October 11, 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.*