Lambda Tuner vs Milling Speed and Feed Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lambda Tuner
This tool helps tune PID controllers using the Lambda method to calculate P, I, and D parameters. It's designed for intuitive use in various process industries and works on self-regulating and integrating loops. You can also use it to learn the impact of different PID parameters.
- Lambda method for PID parameter calculation
- Supports self-regulating and integrating loops
- Intuitive and easy to use interface
- Adjustable Lambda value for reaction speed
- Manual PID parameter testing
- Educational tool for PID parameter impact
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Lambda Tuner is a tool for tuning PID controllers. It is using the “Lambda method” to calculate the P,I and D parameters. It works on self-regulating loops and integrating loops. It's designed to be intuitive, easy to use and is suitable for any kind of process industry. To calculate the parameters you need to describe your process with four values. After that you select the Lambda value, thats a value of how fast you want your controller to react. You can test to manually set the PID parameters, to test if your process description behaves similar in the calculation as in reality. It can also be used as a tool to learn the different impact of the PID parameters.
Milling Speed and Feed Calc
Quickly calculate spindle speed and feed rate for milling operations. This tool provides instant results, supports various units, and includes formulas for reference. Ideal for machinists and CNC operators.
- Instant calculation
- Copy results to other apps
- Includes formulas for reference
- Supports 16 decimal places
- Supports various input units
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Milling Speed and Feed Calculator are machining calculator to find Spindle Speed and Feed Rate fast and easy. Determine the spindle speed (RPM) and feed rate (IPM) for a milling operation. Milling operations remove material by feeding a work-piece into a rotating cutting tool with sharp teeth, such as an end mill or face mill. Features: - Instant calculation - Result are copy able to other app - Formula are include as reference - Support up to 16 decimal place - Support various unit for each input For milling, drilling or creating a tool path for a CNC machine the feed rate must be determined. Calculations use the cutter diameter, number of teeth, cutting speed, and cutting feed, difference work-piece material and tool material should be chosen based on the specific cutting conditions. Materials have rated surface speeds for a given type of cutter. The harder the material the slower the speed. Feed Rate is the speed at which the cutter engages the part and is typically measured in units/minute. Spindle Speed is the rotational frequency of the spindle of the machine, measured in revolutions per minute (RPM). The preferred speed is determined by working backward from the desired surface speed (sfm or m/min) and incorporating the diameter (of workpiece or cutter). Formula: RPM = (12 * SFM) / (PI * CD) RPM = 3.82 * SFM / CD IPR = Ft x NT IPM = Ft x NT x RPM IPM = IPR x rpm Where: RPM - Spindle Speed Ft - Feed/Tooth, Chip Load/Tooth SFM - Surface Speed IPM - Feed Rate CD - Cutter Diameter NT - Cutter Number of Teeth IPR - Cutting Feed Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
Screenshots
Verdict
The clearest difference is rating: Milling Speed and Feed Calc at 3.8 against Lambda Tuner's 3.3. Milling Speed and Feed Calc also leads on ratings volume (24 vs 3) and price ($2.99 vs $3.99). Lambda Tuner's advantage is update cadence (every 19 months vs every 42 months). On ads, in-app purchases, monetization model 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
Lambda Tuner costs $3.99 and Milling Speed and Feed Calc $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Milling Speed and Feed Calc holds the better App Store score, 3.8 against 3.3. That said, the two scores are not equally well evidenced: Milling Speed and Feed Calc has 24 ratings behind it against 3, so its average is the more settled of the two.
Lambda Tuner ships an update every 19 months, Milling Speed and Feed Calc every 42 months. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.
| Parameter | Lambda Tuner | Milling Speed and Feed Calc |
|---|---|---|
| Price | $3.99 | $2.99 — better |
| Rating | 3.3 (3 ratings) | 3.8 (24 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 3 | 24 — better |
| Update frequency | Every 19 months — better | Every 42 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 12 — better |
| Further details — not scored | ||
| Size | 1 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Johan Bjors | Nitrio |
Customer experience
Lambda Tuner
Milling Speed and Feed Calc
In-app purchases
Lambda Tuner
No in-app purchases
Milling Speed and Feed Calc
No in-app purchases
Questions
Is Lambda Tuner free?
Is Milling Speed and Feed Calc free?
Which has better reviews, Lambda Tuner or Milling Speed and Feed Calc?
Do Lambda Tuner or Milling Speed and Feed Calc have ads?
Which is updated more often, Lambda Tuner or Milling Speed and Feed Calc?
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