Comparison

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.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • Instant calculation
  • Copy results to other apps
  • Includes formulas for reference
  • Supports 16 decimal places
  • Supports various input units
Features
Read full description

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

Lambda Tuner4 screens
Milling Speed and Feed Calc4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Lambda Tuner versus Milling Speed and Feed Calc: the parameters behind the verdict, then further details
ParameterLambda TunerMilling Speed and Feed Calc
Price$3.99$2.99 — better
Rating3.3 (3 ratings)3.8 (24 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings324 — better
Update frequencyEvery 19 months — betterEvery 42 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.612 — better
Further details — not scored
Size1 MB8 MB
Age rating4+4+
DeveloperJohan BjorsNitrio

Customer experience

Lambda Tuner

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

Milling Speed and Feed Calc

All ratings24 ratings
Positive70.8%
Neutral0.0%
Negative29.2%
Written reviews9 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Lambda Tuner

No in-app purchases

None

Milling Speed and Feed Calc

No in-app purchases

Questions

Is Lambda Tuner free?
Lambda Tuner costs $3.99, with no in-app purchases.
Is Milling Speed and Feed Calc free?
Milling Speed and Feed Calc costs $2.99, with no in-app purchases.
Which has better reviews, Lambda Tuner or Milling Speed and Feed Calc?
Milling Speed and Feed Calc is rated higher. Lambda Tuner averages 3.3 out of 5 from 3 ratings, while Milling Speed and Feed Calc averages 3.8 from 24 ratings.
Do Lambda Tuner or Milling Speed and Feed Calc have ads?
Neither Lambda Tuner nor Milling Speed and Feed Calc shows ads.
Which is updated more often, Lambda Tuner or Milling Speed and Feed Calc?
Lambda Tuner ships an update every 19 months, and Milling Speed and Feed Calc every 42 months. Most recently, Lambda Tuner was updated on October 8, 2026 and Milling Speed and Feed Calc on October 15, 2026.

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