# Letterbox Check vs Window Cleaning Calculator

The clearest difference is in-app purchases: Letterbox Check at none against Window Cleaning Calculator's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Window Cleaning Calculator sells 3 in-app purchases, starting at $7.99 per month. Letterbox Check asks for nothing beyond the download.

Letterbox Check ships an update every 12 months, Window Cleaning Calculator every 7 months. The most recent releases landed on September 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Letterbox Check | Window Cleaning Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/window-cleaning-calculator/id6504971527/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 7 months** |
| Monetization | — | Free with in-app purchases |
| Size | 21 MB | 16 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Redburst Technologies AB](https://appshunter.io/developer/347889943) | [Hero SoftWash](https://appshunter.io/developer/1691273098) |

## What reviewers say

### Letterbox Check

[App page](https://appshunter.io/ios/app/letterbox-check/id1485736636)

**Features:** Vision Pro support

**In-app purchases:** none


### Window Cleaning Calculator

[App page](https://appshunter.io/ios/app/window-cleaning-calculator/id6504971527)

This app helps window cleaning businesses generate instant price quotes for projects and create recurring cleaning schedules for clients. It aims to systematize pricing, removing guesswork and underpricing for a more scalable business operation.

**Highlights:** Generate instant price quotes, Create regular cleaning plans, Systematize business pricing, Reduce guesswork in quotes, Prevent underpricing jobs, Share pricing with team

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe Monthly | $7.99 | per month |
| Subscribe Quarterly | $18.99 | per 3 months |
| Subscribe Yearly | $59.99 | per year |


## Frequently asked questions

### Is Letterbox Check free?

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

### Is Window Cleaning Calculator free?

Window Cleaning Calculator is free to download, with in-app purchases available.

### Do Letterbox Check or Window Cleaning Calculator have ads?

Neither Letterbox Check nor Window Cleaning Calculator shows ads.

### Which is updated more often, Letterbox Check or Window Cleaning Calculator?

Letterbox Check ships an update every 12 months, and Window Cleaning Calculator every 7 months. Most recently, Letterbox Check was updated on September 28, 2026 and Window Cleaning Calculator on October 24, 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.*