# TimerZ vs Molar Mass Calculator Pro

The clearest difference is price: TimerZ at Free against Molar Mass Calculator Pro's $2.99. TimerZ also leads on update cadence (every 3 months vs every 17 months). Molar Mass Calculator Pro's advantage is review sentiment (100% vs 60%) and in-app purchases (none vs 2). On rating, ratings volume, ads and device support there is nothing between them.

TimerZ is free to download; Molar Mass Calculator Pro costs $2.99 up front. TimerZ sells 2 in-app purchases, starting at $0.99 per month. Molar Mass Calculator Pro asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for TimerZ against 4.8 for Molar Mass Calculator Pro. Both are backed by a comparable volume of ratings — 10 and 6 respectively. Written reviews are what separate them: 60% of TimerZ's written reviews are positive against 100% of Molar Mass Calculator Pro's.

TimerZ ships an update every 3 months, Molar Mass Calculator Pro every 17 months. The most recent releases landed on July 9, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | TimerZ | Molar Mass Calculator Pro |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.7 (10 ratings)](https://appshunter.io/ios/app/timerz-last-timer-youll-need/id420191007/reviews) | **[4.8 (6 ratings)](https://appshunter.io/ios/app/molar-mass-calculator-pro/id1496975776/reviews)** |
| Number of ratings | **10** | 6 |
| Positive reviews | 60.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 17 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | — | **#195** |
| Size | 65 MB | 7 MB |
| Requires iOS | 18.6 | **15.4** |
| Devices | iPhone, iPad, Apple TV | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Squawk Studio, LLC](https://appshunter.io/developer/420191010) | [Pylyp Chernov](https://appshunter.io/developer/1456652778) |

## What reviewers say

### TimerZ

[App page](https://appshunter.io/ios/app/timerz-last-timer-youll-need/id420191007)

This utility app allows users to set multiple countdown timers simultaneously, with options for custom alarms, background operation, and history logging. It offers advanced features like chained timers and Dropbox integration for saving and loading data.

**Highlights:** Multiple simultaneous timers, Background operation, Customizable alarms and sounds, Timer chaining and looping, Activity history logging, Dropbox integration

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Timer Z Pro | $4.99 | one-time |


### Molar Mass Calculator Pro

[App page](https://appshunter.io/ios/app/molar-mass-calculator-pro/id1496975776)

**Currently charting:** #195 Top Paid · Utilities (US App Store)

Easily calculate the molar mass of chemical compounds by simply entering the formula. This app offers instant, efficient, and intuitive calculations with a beautiful user interface, making it ideal for students.

**Highlights:** Molar mass calculation, Formula input, Instant results, Efficient processing, Simple interface, Beautiful UI

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

**In-app purchases:** none


## Frequently asked questions

### Is TimerZ free?

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

### Is Molar Mass Calculator Pro free?

Molar Mass Calculator Pro costs $2.99, with no in-app purchases.

### Which has better reviews, TimerZ or Molar Mass Calculator Pro?

Molar Mass Calculator Pro is rated higher. TimerZ averages 4.7 out of 5 from 10 ratings, while Molar Mass Calculator Pro averages 4.8 from 6 ratings.

### Do TimerZ or Molar Mass Calculator Pro have ads?

Neither TimerZ nor Molar Mass Calculator Pro shows ads.

### Which is updated more often, TimerZ or Molar Mass Calculator Pro?

TimerZ ships an update every 3 months, and Molar Mass Calculator Pro every 17 months. Most recently, TimerZ was updated on July 9, 2026 and Molar Mass Calculator Pro on September 10, 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.*