# Timer 555 Calculator Pro vs Quality Welding Time Tracker

The clearest difference is price: Quality Welding Time Tracker at Free against Timer 555 Calculator Pro's $0.99. Timer 555 Calculator Pro's advantage is rating (4.7 vs 1.0) and ratings volume (3 vs 1). On update cadence, ads, in-app purchases and device support there is nothing between them.

Quality Welding Time Tracker is free to download; Timer 555 Calculator Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Timer 555 Calculator Pro holds the better App Store score, 4.7 against 1.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Timer 555 Calculator Pro ships an update every 3 months, Quality Welding Time Tracker every 2 months. The most recent releases landed on June 4, 2026 and July 10, 2026 respectively.

## The numbers

| Metric | Timer 555 Calculator Pro | Quality Welding Time Tracker |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/timer-555-calculator-pro/id833443125/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/quality-welding-time-tracker/id1433956880/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 3 MB | 22 MB |
| Requires iOS | 13.2 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Pixis Consulting LLC](https://appshunter.io/developer/1244439437) |

## What reviewers say

### Timer 555 Calculator Pro

[App page](https://appshunter.io/ios/app/timer-555-calculator-pro/id833443125)

Calculate parameters for monostable and astable circuits. Find component combinations for desired pulse width or frequency. Share circuit files via iCloud Drive or AirDrop.

**Highlights:** Calculate monostable pulse width, Calculate astable frequency, Find component combinations, Adjust component tolerance, Unlimited combinations (Pro), Share circuit files

**In-app purchases:** none


### Quality Welding Time Tracker

[App page](https://appshunter.io/ios/app/quality-welding-time-tracker/id1433956880)

This app helps mobile users track their time spent on welding and fabrication tasks. It provides a simple interface for logging work hours for professional or personal projects.

**Highlights:** Time tracking for welding, Time tracking for fabrication, Mobile device support, Simple logging interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Timer 555 Calculator Pro free?

Timer 555 Calculator Pro costs $0.99, with no in-app purchases.

### Is Quality Welding Time Tracker free?

Quality Welding Time Tracker is free to download, with no in-app purchases.

### Which has better reviews, Timer 555 Calculator Pro or Quality Welding Time Tracker?

Timer 555 Calculator Pro is rated higher. Timer 555 Calculator Pro averages 4.7 out of 5 from 3 ratings, while Quality Welding Time Tracker averages 1.0 from 1 ratings.

### Do Timer 555 Calculator Pro or Quality Welding Time Tracker have ads?

Neither Timer 555 Calculator Pro nor Quality Welding Time Tracker shows ads.

### Which is updated more often, Timer 555 Calculator Pro or Quality Welding Time Tracker?

Timer 555 Calculator Pro ships an update every 3 months, and Quality Welding Time Tracker every 2 months. Most recently, Timer 555 Calculator Pro was updated on June 4, 2026 and Quality Welding Time Tracker on July 10, 2026.

---

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