Density vs A
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Density
This app calculates radiographic density variations for industrial radiographers and inspectors. It is designed to assist professionals working with ASME Section V standards in their density calculations.
- Radiographic density calculation
- ASME Section V compliance
- Industrial radiographer tool
- Density variation calculations
- Inspector utility
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Radiographic density calculator for use with ASME Section V. Useful for industrial radiographers and inspectors making density variation calculations.
A
This utility app calculates the A-Number for deposited weld metal based on its chemical composition. It simplifies the process of comparing weld metal composition against ASME Section IX standards, aiding in procedure qualification and ensuring compliance.
- Determines A-Number from chemical composition
- Compares weld metal to ASME Section IX ranges
- Aids in procedure qualification
- Supports ASME Section IX 2023 Edition
- Provides accurate results
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Background The A-Number is essential variable in most of the welding process in ASME Section IX. A-Number in WPS does not refer to the filler wire or electrode chemical composition, it refers to the deposited weld metal chemical composition. The filler metal and deposited weld metal have different chemical composition. Acceptable method of determining weld metal chemical composition is given in QW-404.5 of ASME Section IX. Applicable Code / Edition & Standards The weld metal A-Number determination is in accordance with ASME Section IX 2023 Edition. Utility This app determine the assigned A-Number based on chemical composition in a "as weld" condition. Weld metal A-Number is used for procedure qualification. Changes in weld metal A-Number may require procedure re-qualification. Competitive Edge There is no app available in the market to determine weld metal A-Number. User mostly compare weld metal composition against ranges given in ASME Section IX. This handy tool makes life easy by comparing the chemical composition to that of the ranges for given A-Number and provide accurate result. Target Audience This app targets inspection agencies, pressure items manufacturing organizations, quality control personnel, welders, welding operators, students who are involved in welding trades and institutions who are doing procedure qualification testing.
Screenshots
Verdict
The clearest difference is rating: A at 5.0 against Density's 2.5. A also leads on update cadence (every 10 months vs every 75 months) and device support (4 vs 2). Density's advantage is in-app purchases (none vs 1) and ratings volume (8 vs 1). On price, ads and monetization model 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
Both are free to download. A sells 1 one-off in-app purchase. Density asks for nothing beyond the download.
A holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: Density has 8 ratings behind it against 1, so its average is the more settled of the two.
Density ships an update every 75 months, A every 10 months. The most recent releases landed on September 28, 2026 and September 22, 2026 respectively.
| Parameter | Density | A |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (8 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 20.0% of reviews | — |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 75 months | Every 10 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 8.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 0 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Lance Henderson | Shabbir Ahmed |
Customer experience
Density
A
In-app purchases
Density
No in-app purchases
A
- Non-Consumable Subscription$1.99
