Engineering Converter vs Material Numbers
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Engineering Converter
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This engineering converter provides basic conversions between units of measure for common and engineering units. This app has the capability to convert units for the following types of measurement: Temperature Length Mass Mole Area Volume Time Velocity Acceleration Density Molar Density Molar Volume Force Pressure Energy Power Mass Flow Mole Flow Volume Flow Heat Capacity Molar Heat Capacity Latent Heat Molar Latent Heat Conductivity Viscosity Diffusivity Surface Tension
Material Numbers
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M Numbers: Quick lookup of base metal weldability grouping numbers (Material Numbers) for welding procedure and performance qualification. Data is provided by C-spec from the master source used for generation, proof-reading and maintenance of AWS B2.1 Table C.1 and C.2.
Screenshots
Verdict
The clearest difference is ads: Material Numbers at none against Engineering Converter's shown. Material Numbers also leads on update cadence (every 2 days vs every 42 months) and iOS requirement (13.0 vs 15.0). On price, 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 Converter ships an update every 42 months, Material Numbers every 2 days. The most recent releases landed on September 12, 2026 and September 26, 2026 respectively.
| Parameter | Engineering Converter | Material Numbers |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 42 months | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Brook Wallace | ASMEIX CORPORATION |
In-app purchases
Engineering Converter
No in-app purchases
Material Numbers
No in-app purchases
Questions
Is Engineering Converter free?
Is Material Numbers free?
Do Engineering Converter or Material Numbers have ads?
Which is updated more often, Engineering Converter or Material Numbers?
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