# Belt Length Calculator Pro vs FedNote

The clearest difference is price: FedNote at Free against Belt Length Calculator Pro's $2.99. FedNote also leads on update cadence (every 2 days vs every 41 months) and iOS requirement (12.0 vs 16.1). Belt Length Calculator Pro's advantage is in-app purchases (none vs 3). On ads and device support there is nothing between them.

FedNote is free to download; Belt Length Calculator Pro costs $2.99 up front. FedNote sells 3 one-off in-app purchases. Belt Length Calculator Pro asks for nothing beyond the download.

Belt Length Calculator Pro ships an update every 41 months, FedNote every 2 days. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Belt Length Calculator Pro | FedNote |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/belt-length-calculator-pro/id1487292230/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 2 days** |
| Monetization | Paid | — |
| Size | 1 MB | 38 MB |
| Requires iOS | 16.1 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Imran Pinjara](https://appshunter.io/developer/1484488781) | [Polemics Applications LLC](https://appshunter.io/developer/482504032) |

## What reviewers say

### Belt Length Calculator Pro

[App page](https://appshunter.io/ios/app/belt-length-calculator-pro/id1487292230)

Calculate the required belt length for drive systems using open or cross belt arrangements. Input pulley diameters and center distance to get the precise belt length needed.

**Highlights:** Open belt arrangement calculation, Cross belt arrangement calculation, Input large pulley diameter, Input small pulley diameter, Input center length of pulleys, Provides belt length output

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

**In-app purchases:** none


### FedNote

[App page](https://appshunter.io/ios/app/fednote/id6742114931)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FedNote Tip $0.99 | $0.99 | one-time |
| FedNote Tip $4.99 | $4.99 | one-time |
| FedNote Tip $9.99 | $9.99 | one-time |


## Frequently asked questions

### Is Belt Length Calculator Pro free?

Belt Length Calculator Pro costs $2.99, with no in-app purchases.

### Is FedNote free?

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

### Do Belt Length Calculator Pro or FedNote have ads?

Neither Belt Length Calculator Pro nor FedNote shows ads.

### Which is updated more often, Belt Length Calculator Pro or FedNote?

Belt Length Calculator Pro ships an update every 41 months, and FedNote every 2 days. Most recently, Belt Length Calculator Pro was updated on November 3, 2026 and FedNote on November 8, 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.*