# Laboratory Timer vs Calculator Smart

Laboratory Timer and Calculator Smart both sit at 4.7 stars, but that hides the real split: 92% of Laboratory Timer's written reviews are positive against 36% of Calculator Smart's. Laboratory Timer also leads on in-app purchases (none vs 3) and ads (none vs shown). Calculator Smart's advantage is ratings volume (494 vs 47). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. Calculator Smart sells 3 one-off in-app purchases. Laboratory Timer asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Laboratory Timer against 4.7 for Calculator Smart. That said, the two scores are not equally well evidenced: Calculator Smart has 494 ratings behind it against 47, so its average is the more settled of the two. Written reviews are what separate them: 92% of Laboratory Timer's written reviews are positive against 36% of Calculator Smart's.

Laboratory Timer ships an update every 3 months, Calculator Smart every 4 months. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Laboratory Timer | Calculator Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (47 ratings)](https://appshunter.io/ios/app/laboratory-timer/id537195348/reviews) | [4.7 (494 ratings)](https://appshunter.io/ios/app/calculator-smart/id698030968/reviews) |
| Number of ratings | 47 | **494** |
| Positive reviews | **91.7% of reviews** | 36.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 24 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod, Apple TV, Apple Watch | **iPhone, iPad, iPod, Mac, Apple TV, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [shazino](https://appshunter.io/developer/529461205) | [Miroslav Otsedarski](https://appshunter.io/developer/450091139) |

## What reviewers say

### Laboratory Timer

[App page](https://appshunter.io/ios/app/laboratory-timer/id537195348)

Manage multiple countdown timers simultaneously for scientific experiments. This app features a user-friendly interface, the ability to save presets, and notifications when alarms sound. It also offers Apple Watch integration for real-time visualization and alerts.

**Highlights:** Run multiple timers concurrently, Save preset timers with names, Pause and resume timers, Receive alarm notifications, Apple Watch real-time visualization, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculator Smart

[App page](https://appshunter.io/ios/app/calculator-smart/id698030968)

This app offers a powerful and precise calculator for everyday math and advanced scientific computations. It features a clean interface with large buttons, supporting complex equations, multiple modes, and intuitive input methods. Personalize your experience with colorful skins and custom icons.

**Highlights:** 30+ scientific operations, Degrees and Radians support, Parentheses and nested equations, Intuitive input with slide-to-delete, Copy & Paste results, Apple Watch app and Lock Screen Widget, Colorful skins and custom icons

**Features:** Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Colorful Skins and Remove Ads | $1.99 | one-time |
| Colorful Skins | $1.99 | one-time |
| Colorful Skins for Mac app | $1.99 | one-time |


## Frequently asked questions

### Is Laboratory Timer free?

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

### Is Calculator Smart free?

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

### Which has better reviews, Laboratory Timer or Calculator Smart?

Laboratory Timer and Calculator Smart are both rated 4.7 out of 5 on the App Store, from 47 and 494 ratings respectively.

### Do Laboratory Timer or Calculator Smart have ads?

Calculator Smart shows ads; Laboratory Timer does not.

### Which is updated more often, Laboratory Timer or Calculator Smart?

Laboratory Timer ships an update every 3 months, and Calculator Smart every 4 months. Most recently, Laboratory Timer was updated on October 2, 2026 and Calculator Smart on October 11, 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.*