JavaScript Studio Pro vs ECD Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JavaScript Studio Pro
Develop web applications on your mobile device using JavaScript, CSS, and HTML. This tool offers error checking assistance as you code, ensuring you don't lose track of your ideas. Create and save your projects anywhere, anytime.
- Write JavaScript, CSS, HTML code
- Create web applications
- Error checking assistance
- Save code and ideas
- Mobile development environment
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Use your JavaScript, CSS, html skills to create apps wherever you go. These days many of us we use a smartphone anytime, as a developers sometimes we write code using some text editor to save it, for this reason I developed JavaScript Studio app a smart app that works on your phone, With JavaScript Studio you can create web apps by writing JavaScript code, CSS, Html, Html5. Error Checking? Yes, JavaScript Studio will help on it while coding by inserting a simple comment text. Never Miss any code and idea again Use JavaScript Studio Pro. ARROWAT™ JavaScript Studio Pro.
ECD Calculator
This utility app assists drilling and mud engineers in calculating Equivalent Circulating Density (ECD) at any point during operations. It offers a streamlined process with just a few clicks.
- ECD calculation
- Drilling engineering
- Mud engineering
- Point-of-operation calculation
- Streamlined interface
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ECD calculator help drilling and mud engineers calculate the ECD at any point with a few click
Screenshots
Verdict
The clearest difference is price: ECD Calculator at Free against JavaScript Studio Pro's $12.99. ECD Calculator also leads on update cadence (every 5 days vs every 20 months) and ratings volume (5 vs 1). JavaScript Studio Pro's advantage is in-app purchases (none vs 2) and iOS requirement (10.0 vs 15.1). On rating, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
ECD Calculator is free to download; JavaScript Studio Pro costs $12.99 up front. ECD Calculator sells 2 one-off in-app purchases. JavaScript Studio Pro asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for JavaScript Studio Pro against 5.0 for ECD Calculator. That said, the two scores are not equally well evidenced: ECD Calculator has 5 ratings behind it against 1, so its average is the more settled of the two.
JavaScript Studio Pro ships an update every 20 months, ECD Calculator every 5 days. The most recent releases landed on September 29, 2026 and October 1, 2026 respectively.
| Parameter | JavaScript Studio Pro | ECD Calculator |
|---|---|---|
| Price | $12.99 | Free — better |
| Rating | 5.0 (1 ratings) | 5.0 (5 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 20 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 33 MB | 45 MB |
| Age rating | 4+ | 17+ |
| Developer | Arrowat LLC | Drillsoft LLC |
Customer experience
JavaScript Studio Pro
ECD Calculator
In-app purchases
JavaScript Studio Pro
No in-app purchases
ECD Calculator
- 50 credits$3.99
- 300 Credits$9.99
Questions
Is JavaScript Studio Pro free?
Is ECD Calculator free?
Which has better reviews, JavaScript Studio Pro or ECD Calculator?
Do JavaScript Studio Pro or ECD Calculator have ads?
Which is updated more often, JavaScript Studio Pro or ECD Calculator?
Other comparisons
