# Percent Error Calculator vs TPI Bridge

The clearest difference is iOS requirement: TPI Bridge at 11.0 against Percent Error Calculator's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Percent Error Calculator | TPI Bridge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Size | 40 MB | 66 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stage Coding](https://appshunter.io/developer/1637068135) | [C-Cubed](https://appshunter.io/developer/426768181) |

## What reviewers say

### Percent Error Calculator

[App page](https://appshunter.io/ios/app/percent-error-calculator/id1619680411)

**Features:** macOS Compatibility

**In-app purchases:** none


### TPI Bridge

[App page](https://appshunter.io/ios/app/tpi-bridge/id6471507477)

**In-app purchases:** none


## Frequently asked questions

### Is Percent Error Calculator free?

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

### Is TPI Bridge free?

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

### Do Percent Error Calculator or TPI Bridge have ads?

Neither Percent Error Calculator nor TPI Bridge shows ads.

### Which is updated more often, Percent Error Calculator or TPI Bridge?

Percent Error Calculator ships an update weekly, and TPI Bridge weekly. Most recently, Percent Error Calculator was updated on October 3, 2026 and TPI Bridge on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*