# TaskBell vs SolarCalc Pro

The clearest difference is in-app purchases: TaskBell at none against SolarCalc Pro's 2. TaskBell also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SolarCalc Pro sells 2 in-app purchases, starting at $1.99 per 7 days. TaskBell asks for nothing beyond the download.

TaskBell ships an update every 3 weeks, SolarCalc Pro every 4 weeks. The most recent releases landed on August 17, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | TaskBell | SolarCalc Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Size | 27 MB | 18 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [IT WAVES](https://appshunter.io/developer/1596113244) | [Ersel Tarhan](https://appshunter.io/developer/1093545232) |

## What reviewers say

### TaskBell

[App page](https://appshunter.io/ios/app/taskbell-timely-task-alerts/id6744843575)

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

**In-app purchases:** none


### SolarCalc Pro

[App page](https://appshunter.io/ios/app/solarcalc-pro-off-grid-solar/id6761887441)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SolarCalc Premium | $1.99 | per 7 days |
| SolarCalc Premium | $19.99 | per year |


## Frequently asked questions

### Is TaskBell free?

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

### Is SolarCalc Pro free?

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

### Do TaskBell or SolarCalc Pro have ads?

Neither TaskBell nor SolarCalc Pro shows ads.

### Which is updated more often, TaskBell or SolarCalc Pro?

TaskBell ships an update every 3 weeks, and SolarCalc Pro every 4 weeks. Most recently, TaskBell was updated on August 17, 2026 and SolarCalc Pro on August 19, 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.*