# ProGraph Calculator vs BellSensing Plus

The clearest difference is update cadence: BellSensing Plus at every 4 weeks against ProGraph Calculator's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

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

ProGraph Calculator ships an update every 3 months, BellSensing Plus every 4 weeks. The most recent releases landed on September 17, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | ProGraph Calculator | BellSensing Plus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Size | 1 MB | 20 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Michael Pingleton](https://appshunter.io/developer/1584719976) | [SmartWave Technologies Corporation](https://appshunter.io/developer/1117413044) |

## What reviewers say

### ProGraph Calculator

[App page](https://appshunter.io/ios/app/prograph-calculator/id1629338359)

**Features:** macOS Compatibility

**In-app purchases:** none


### BellSensing Plus

[App page](https://appshunter.io/ios/app/bellsensing-plus/id1658800937)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ProGraph Calculator free?

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

### Is BellSensing Plus free?

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

### Do ProGraph Calculator or BellSensing Plus have ads?

Neither ProGraph Calculator nor BellSensing Plus shows ads.

### Which is updated more often, ProGraph Calculator or BellSensing Plus?

ProGraph Calculator ships an update every 3 months, and BellSensing Plus every 4 weeks. Most recently, ProGraph Calculator was updated on September 17, 2026 and BellSensing Plus on September 7, 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.*