# BlueBox vs CRS Calculator

The clearest difference is in-app purchases: BlueBox at none against CRS Calculator's 14. CRS Calculator's advantage is update cadence (every 2 weeks vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CRS Calculator sells 12 in-app purchases, starting at $5.99 per 7 days. BlueBox asks for nothing beyond the download.

BlueBox ships an update monthly, CRS Calculator every 2 weeks. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | BlueBox | CRS Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 2.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 97 MB | 60 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bluebits Technologies Inc.](https://appshunter.io/developer/1658666447) | [Charles Edward Robin](https://appshunter.io/developer/1803038517) |

## What reviewers say

### BlueBox

[App page](https://appshunter.io/ios/app/bluebox/id1580163685)

Manage your package deliveries effortlessly with this smart locker app. Track incoming parcels, receive instant notifications, and unlock your locker compartment remotely. Enjoy secure, 24/7 access to your deliveries.

**Highlights:** Track completed and pending parcels, Unlock locker compartment remotely, Receive parcel arrival notifications, Search parcel data by phone or carrier, Choose email or SMS communication, Dark mode option

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

**In-app purchases:** none


### CRS Calculator

[App page](https://appshunter.io/ios/app/crs-calculator-pr-buddy/id6770178397)

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PR Buddy Pro Weekly | $5.99 | per 7 days |
| PR Buddy Pro Monthly | $5.99 | per month |
| PR Buddy Pro - Weekly | $5.99 | per 7 days |
| PR Buddy Pro Monthly | $5.99 | per month |
| PR Buddy Pro Monthly | $7.99 | per month |
| PR Buddy Pro - Monthly | $7.99 | per month |
| PR Buddy Pro - Yearly | $24.99 | per year |
| PR Buddy Pro Yearly | $29.99 | per year |
| PR Buddy Pro Lifetime | $9.99 | one-time |
| PR Buddy Pro - Lifetime | $19.99 | one-time |
| PR Buddy Pro Lifetime | $19.99 | one-time |
| PR Buddy Pro - Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is BlueBox free?

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

### Is CRS Calculator free?

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

### Do BlueBox or CRS Calculator have ads?

Neither BlueBox nor CRS Calculator shows ads.

### Which is updated more often, BlueBox or CRS Calculator?

BlueBox ships an update monthly, and CRS Calculator every 2 weeks. Most recently, BlueBox was updated on November 3, 2026 and CRS Calculator on October 28, 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.*