# USPS Mobile® vs Book Thickness Calculator

The clearest difference is price: USPS Mobile® at Free against Book Thickness Calculator's $0.99. USPS Mobile® also leads on update cadence (every 2 months vs every 37 months) and chart position (#33 vs unranked). Book Thickness Calculator's advantage is iOS requirement (8.1 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

USPS Mobile® is free to download; Book Thickness Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

USPS Mobile® ships an update every 2 months, Book Thickness Calculator every 37 months. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | USPS Mobile® | Book Thickness Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.8 (1.8M ratings)](https://appshunter.io/ios/app/usps-mobile/id339597578/reviews)** | — |
| Number of ratings | **1.8M** | — |
| Positive reviews | 49.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 37 months |
| Monetization | Free | — |
| Best chart rank | **#33** | — |
| Size | 20 MB | 2 MB |
| Requires iOS | 17.0 | **8.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [United States Postal Service](https://appshunter.io/developer/339597581) | [Manfred Breede](https://appshunter.io/developer/414696754) |

## What reviewers say

### USPS Mobile®

[App page](https://appshunter.io/ios/app/usps-mobile/id339597578)

**Currently charting:** #33 Top Free · Business (US App Store)

Manage your mail and packages on the go. Track shipments, calculate postage, find nearby postal locations, and schedule pickups. Access digital mail previews and request mail holds for convenient postal services.

**Highlights:** Track shipments, Calculate shipping prices, Find Post Office locations, Schedule package pickups, Request mail holds, Digital mail preview

**In-app purchases:** none

**What reviewers like**

- 🚀 Lightning-fast app
- 🔒 Robust security features
- 👍 Convenient for tracking packages
- 💡 Helpful informed delivery feature

**What reviewers complain about**

- 🐛 Buggy and glitchy
- 🔄 Constantly redirecting to website
- 🤔 Confusing user interface
- 🔍 Lacking package management features

**Reported bugs**

- Tracking not working after updates
- Unable to delete delivered packages
- App crashes when trying to track
- Inconsistent package status updates

**Requested features**

- Allow renaming of tracking numbers
- Implement stay-logged-in functionality
- Add push notifications for package updates
- Integrate more USPS services natively


### Book Thickness Calculator

[App page](https://appshunter.io/ios/app/book-thickness-calculator/id459990015)

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

**In-app purchases:** none


## Frequently asked questions

### Is USPS Mobile® free?

USPS Mobile® is free to download, with no in-app purchases.

### Is Book Thickness Calculator free?

Book Thickness Calculator costs $0.99, with no in-app purchases.

### Do USPS Mobile® or Book Thickness Calculator have ads?

Neither USPS Mobile® nor Book Thickness Calculator shows ads.

### Which is updated more often, USPS Mobile® or Book Thickness Calculator?

USPS Mobile® ships an update every 2 months, and Book Thickness Calculator every 37 months. Most recently, USPS Mobile® was updated on October 31, 2026 and Book Thickness Calculator on October 29, 2026.

---

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