Comparison

TDMS vs Shaft Alignment Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

TDMS

Features
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■Manage measurement data using standard to determine pass/fail The measured torque and angle values are judged based on the upper and lower limits registered for each potion, and saved with adding date, time and pass/fail judgment result. ■Work information can be registered on the app or by imported in bulk with the master file. Work information such as standard values and number of spindle be easily registered on the app. Batch registration is also possible by creating and importing a master file in Excel or CSV format. ■For detecting abnormalities in early stage, automatically processed statistical data from the measured results. To detect abnormalities early stage, "N", "X-bar", "σ", "cp" and "cpk" are automatically calculated from the measurement data. ■Outputs saved measurement data and statistical data as a file The data can review in the app and also output it as an Excel or CSV file. ■Compatible with many Tohnichi Digital products It can easily establish data management system by connecting with Tohnichi product. ■Sends the portion information to be measured to the torque wrench. The registered portion information will be sent to Tohnichi digital products, it allows to perform your operation while switching the standard values according to each portion.

About

Shaft Alignment Calculator

Features
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During shaft alignment of rotating machinery, this app calculates the required shim amounts for the front and rear feet, as well as the horizontal adjustment direction and distance, based on 4-point Rim and Face dial indicator readings. Furthermore, if the alignment can be brought within your custom "Tolerance" limits by adjusting only one set of feet (front or rear), the app automatically simulates and displays the "Optimal Shim Amount," "Adjustment Range," and "Predicted Residual (Remaining Misalignment)." --- Key Features --- [NEW] Reverse Indicator Method Support Fully supports the Rim-Rim reading method on both sides of the coupling. Includes a dedicated input screen with automatic compensation for Bar Sag values. Enter the distances using the stationary indicator position as the starting point (0). [NEW] Single-Foot Adjustment Simulation Enter your Rim and Face tolerances in "Settings". If the alignment can be fixed by moving only the front or rear feet, it automatically suggests the optimal shim amount, acceptable adjustment range, and the resulting residual misalignment. (*If the tolerance is set to 0, single-foot adjustment suggestions will not be displayed.*) [NEW] Custom Tolerance Settings Freely set and modify Rim and Face tolerance values to match your specific site standards. [NEW] Alignment Visualizer (Windows Only) Graphically displays the alignment status based on calculation results. • Memory Function Input values are retained even if you close the app halfway through. • Calculation History Saves up to 30 recent calculation results, automatically overwriting the oldest entries. • Save Measurement Records Save the final, in-tolerance Rim and Face readings along with the Machine Name and Gap distance (up to 30 records). • Face (+/-) Toggle Press the "+=" button to easily switch between "+ = Closed" and "+ = Open" for Face gauge readings. • Offset Function Enabling this displays input fields. Enter values in the desired offset direction, and they will be reflected in the calculation. • Average Mode Enabling this adds extra Rim/Face input fields. The app will calculate based on the average of two measurements. (*Not available in Reverse Indicator mode.*) • Swap Gauge Setup Turn this ON if your dial indicators are set up to read from the Driven machine to the Motor. (*Not available in Reverse Indicator mode.*) • Dark Mode Ensures optimal visibility in various environments, whether indoors or outdoors. --- App Highlights --- • Lightweight operation without complex animations, preventing unnecessary battery and memory drain. • Fully standalone application; works perfectly in underground facilities or deep inside plants without an internet connection. --- Specifications --- • "Left/Right" in the app refers to the direction when looking from the motor toward the driven machine. • Enter Coupling Diameter (or Gauge Span for Reverse mode) and Front/Rear distances in mm. Enter Rim, Face, and Bar Sag values in hundredths of a millimeter as whole numbers (e.g., enter 15 for 0.15 mm). • For inch/mil (thou) calculations, enter Coupling Diameter and distances in inches. Enter Rim, Face, and Bar Sag values in mils/thou as whole numbers (e.g., enter 5 for 5 mils). --- How to Use --- 1. Enter the machine dimensions. 2. Enter the 4-point measurement readings. 3. Check the "+=" button setting (*Rim-Face method only*). 4. Tap the "Calculate" button. ---

Screenshots

TDMS4 screens
Shaft Alignment Calculator4 screens

Verdict

The call

The clearest difference is price: TDMS at Free against Shaft Alignment Calculator's $5.99. Shaft Alignment Calculator's advantage is update cadence (every 2 days vs every 26 months) and iOS requirement (13.0 vs 15.0). On 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

CostPrice · In-app purchases · Ads · Monetization

TDMS is free to download; Shaft Alignment Calculator costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

TDMS ships an update every 26 months, Shaft Alignment Calculator every 2 days. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 3 level
TDMS versus Shaft Alignment Calculator: the parameters behind the verdict, then further details
ParameterTDMSShaft Alignment Calculator
PriceFree — better$5.99
Update frequencyEvery 26 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size4 MB20 MB
Age rating4+4+
DeveloperTOHNICHI MFG.CO., LTD.Eiji Shinohara

In-app purchases

None

TDMS

No in-app purchases

None

Shaft Alignment Calculator

No in-app purchases

Questions

Is TDMS free?
TDMS is free to download, with no in-app purchases.
Is Shaft Alignment Calculator free?
Shaft Alignment Calculator costs $5.99, with no in-app purchases.
Do TDMS or Shaft Alignment Calculator have ads?
Neither TDMS nor Shaft Alignment Calculator shows ads.
Which is updated more often, TDMS or Shaft Alignment Calculator?
TDMS ships an update every 26 months, and Shaft Alignment Calculator every 2 days. Most recently, TDMS was updated on October 25, 2026 and Shaft Alignment Calculator on October 28, 2026.

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