# Conversion Calculator vs TZ Package Lockers

The clearest difference is in-app purchases: TZ Package Lockers at none against Conversion Calculator's 1. Conversion Calculator's advantage is ratings volume (165 vs 2) and rating (4.8 vs 4.5). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. Conversion Calculator sells 1 one-off in-app purchase. TZ Package Lockers asks for nothing beyond the download.

Conversion Calculator holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Conversion Calculator has 165 ratings behind it against 2, so its average is the more settled of the two.

Conversion Calculator ships an update every 5 weeks, TZ Package Lockers every 2 months. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Conversion Calculator | TZ Package Lockers |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (165 ratings)](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/tz-package-lockers/id6470619525/reviews) |
| Number of ratings | **165** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 10 MB | 135 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Collins Cheruiyot](https://appshunter.io/developer/1579009978) | [TZI Australia Pty Limited](https://appshunter.io/developer/1304033336) |

## What reviewers say

### Conversion Calculator

[App page](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523)

This utility app offers a comprehensive unit conversion tool for various needs, including cooking, travel, and work. It supports over 120 units across 15 categories, with metric and imperial options. The app works offline and allows for customization of displayed decimals and category order.

**Highlights:** 15 categories and 120+ units, Metric and imperial conversions, Cooking, weight, length, temperature, and more, Offline functionality, Customizable decimal display, Apple Watch app

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access forever | $8.99 | one-time |


### TZ Package Lockers

[App page](https://appshunter.io/ios/app/tz-package-lockers/id6470619525)

This app allows registered users to manage package deliveries and access smart lockers. Receive real-time notifications, view package details, and choose your preferred method to open locker doors for retrieval. You can also review your transaction history and manage your profile.

**Highlights:** View pending package details, Real-time delivery notifications, Multiple locker access options, Scan QR codes for access, Bluetooth proximity access, Package transaction history, Profile and preference management

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

**In-app purchases:** none


## Frequently asked questions

### Is Conversion Calculator free?

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

### Is TZ Package Lockers free?

TZ Package Lockers is free to download, with no in-app purchases.

### Which has better reviews, Conversion Calculator or TZ Package Lockers?

Conversion Calculator is rated higher. Conversion Calculator averages 4.8 out of 5 from 165 ratings, while TZ Package Lockers averages 4.5 from 2 ratings.

### Do Conversion Calculator or TZ Package Lockers have ads?

Neither Conversion Calculator nor TZ Package Lockers shows ads.

### Which is updated more often, Conversion Calculator or TZ Package Lockers?

Conversion Calculator ships an update every 5 weeks, and TZ Package Lockers every 2 months. Most recently, Conversion Calculator was updated on October 30, 2026 and TZ Package Lockers 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.*