U vs TDMS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
U
Streamline your workflow by directly inputting measurements from calipers and micrometers. This application simplifies data collection for process control, making it easier to manage your measurements.
- Direct caliper data input
- Direct micrometer data input
- Process control functionality
- Easy data collection
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Easy process control by directly taking in caliper and micrometer data.
TDMS
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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.
Screenshots
Verdict
The clearest difference is update cadence: U at every 11 months against TDMS's every 26 months. U also leads on iOS requirement (11.0 vs 15.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
U ships an update every 11 months, TDMS every 26 months. The most recent releases landed on September 29, 2026 and October 1, 2026 respectively.
| Parameter | U | TDMS |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 11 months — better | Every 26 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 13 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | MITUTOYO CORPORATION | TOHNICHI MFG.CO., LTD. |
In-app purchases
U
No in-app purchases
TDMS
No in-app purchases









