Drill Bit Converter vs Material Removal Rate
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Drill Bit Converter
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If you have ever had to try to figure out which Fractional or Decimal bit is close enough to a particular Metric size, this is the app for you. Drill Bit Converter performs rapid conversions between Inch Fractional, Inch Decimal, Metric, and Gauge Drill Sizes. Simply select the unit of interest, type in a value, and the nearest equivalent of all other unis will be instantly displayed. When conversions to Inch Fractional or Gauge sizes are not exact, the app will display the amount of error. You can then easily tell if you have an alternative drill bit on hand that is close enough for your project. The app also includes a help display to explain the key features of the app, and it includes several pdf files containing helpful reference charts for drill and tap conversions and selections. You can email or print these charts. Printing requires an Air Print Connection. We welcome your feedback and suggestions for improvement. Thanks for considering our offering.
Material Removal Rate
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Boost throughput and cut guesswork with the Material Removal Rate Calculator—your quick, reliable way to quantify MRR and tune cutting parameters for real-world results. Material removal rate is the volume removed per unit time and a direct indicator of cutting efficiency, cycle time, and profitability. Built for production decisions Get fast, consistent answers when you are comparing setups and tooling, verifying CAM programs on the floor, estimating cycle time and machine load, and balancing productivity versus tool life. What’s inside MRR calculators for Turning, Milling, Drilling, Grinding, and Grooving—enter depth and width of cut and feed to compute removal volume instantly. Spindle Speed and Feed Rate helpers turn SFM, RPM, IPT, and IPM into actionable machine settings. Chip Load (Feed per Tooth) guidance helps you hit proper chip thickness per edge and avoid rubbing or overload. Make better trade-offs Finding the sweet spot between speed and feed protects tool life while keeping parts moving. The app helps you understand those levers so you can push feed where it matters, trim cutting speed when heat is climbing, and keep surface finish on spec. Why it matters Faster setup validation by quantifying removal rates when you change cutters, holders, or offsets. Repeatable results by standardizing shop math across shifts and machines. Less waste and more parts by reducing trial and error and moving toward predictable cycle times. Whether you are roughing aluminum, profiling stainless, drilling deep holes, or grinding to finish, this calculator brings proven shop math to your pocket so you can decide with data, not hunches.
Screenshots
Verdict
The clearest difference is ads: Drill Bit Converter at none against Material Removal Rate's shown. Drill Bit Converter also leads on price ($0.99 vs $1.99) and iOS requirement (13.0 vs 16.2). Material Removal Rate's advantage is update cadence (every 8 months vs every 54 months). On 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
Drill Bit Converter costs $0.99 and Material Removal Rate $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Drill Bit Converter ships an update every 54 months, Material Removal Rate every 8 months. The most recent releases landed on September 21, 2026 and June 24, 2026 respectively.
| Parameter | Drill Bit Converter | Material Removal Rate |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Update frequency | Every 54 months | Every 8 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.2 |
| Further details — not scored | ||
| Size | 2 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Dohmann Engineering Services | Vladislav Zhirnov |
In-app purchases
Drill Bit Converter
No in-app purchases
Material Removal Rate
No in-app purchases





