# Calculus + vs Boeing FeedbackApp

The clearest difference is update cadence: Calculus + at daily against Boeing FeedbackApp's every 3 months. Calculus + also leads on iOS requirement (15.6 vs 17.0). 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.

Calculus + ships an update daily, Boeing FeedbackApp every 3 months. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Calculus + | Boeing FeedbackApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/boeing-feedbackapp/id6747784600/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 months |
| Monetization | — | Free |
| Size | 8 MB | 98 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [KeoGlobal](https://appshunter.io/developer/1708575837) | [The Boeing Company](https://appshunter.io/developer/493615170) |

## What reviewers say

### Calculus +

[App page](https://appshunter.io/ios/app/calculus-plus/id6746851592)

**In-app purchases:** none


### Boeing FeedbackApp

[App page](https://appshunter.io/ios/app/boeing-feedbackapp/id6747784600)

This platform enables airline mechanics to collaborate, share maintenance insights, and access technical resources. It aims to improve customer engagement by speeding up feedback and distributing best practices.

**Highlights:** Collaborative maintenance insights sharing, Troubleshooting issue resolution, Access to Boeing technical resources, Improved customer engagement, Faster feedback loops, Distribution of best practices

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculus + free?

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

### Is Boeing FeedbackApp free?

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

### Do Calculus + or Boeing FeedbackApp have ads?

Neither Calculus + nor Boeing FeedbackApp shows ads.

### Which is updated more often, Calculus + or Boeing FeedbackApp?

Calculus + ships an update daily, and Boeing FeedbackApp every 3 months. Most recently, Calculus + was updated on October 6, 2026 and Boeing FeedbackApp on October 5, 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.*