Engineering HandBook vs Roughness
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Engineering HandBook
Access essential engineering formulas and concepts on the go. This app covers materials, numbers, mechanics, components, and metal cutting operations, providing accurate calculations for various engineering tasks.
- Engineering formulas and calculations
- Materials classification and properties
- Basic and trigonometric calculations
- Unit conversions
- Gear drive formulas
- Metal cutting operation calculations
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Engineering HandBook allows you to carry engineering concepts where-ever you go. Features available in Engineering handbook are: 1. Materials. 2. Numbers. 3. Mechanics. 4. Engineering Components, and 5. Metal Cutting Components. View various engineering related formulas and calculate values. Calculate accurately and access formulas while on worksite, in meetings, or during Work. Materials features: Classification of categories of ferrous metals (Steel, Iron), Non-ferrous metals and Plastics. Property details of various Elements. Calculate equal and unequal angles as per Indian Standards. Numbers features: Basic mathematical calculations. Trigonometric calculation. Pythagorean theorem. Inch to Millimeter and vice versa convertor. Units of physical quantities. Symbols, and Measures and weights. Mechanics features: Formulas for Gear drive and dimensions. Engineering Components Features: Hole to Shaft and vice versa Convertion. Metal Cutting Operation features: Calculate Folding, edging and Cold bending value. Cutting speed. Machining time. Clearance between die and punch, and Cutting force.
Roughness
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When it comes to the surface of workpieces, a large number of surface parameters are required in design and manufacture. Before installation or delivery, the workpieces are also verified in quality management. The roughness app from ZEISS provides information on the most common surface parameters with related formulas and graphs.
Screenshots
Verdict
The clearest difference is update cadence: Engineering HandBook at every 2 weeks against Roughness's every 14 months. Engineering HandBook also leads on iOS requirement (6.0 vs 15.0). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Engineering HandBook ships an update every 2 weeks, Roughness every 14 months. The most recent releases landed on June 8, 2026 and March 5, 2026 respectively.
| Parameter | Engineering HandBook | Roughness |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 weeks — better | Every 14 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 6.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 12 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Raghu Srinivas | Carl Zeiss AG |
In-app purchases
Engineering HandBook
No in-app purchases
Roughness
No in-app purchases
Questions
Is Engineering HandBook free?
Is Roughness free?
Do Engineering HandBook or Roughness have ads?
Which is updated more often, Engineering HandBook or Roughness?
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