RMS: Pressure Sensor 4+

Resistive Measurement System

Prime Numeral Enterprises

Designed for iPad

    • $9.99



Graph, record, explore, compare, and analyze measurements from any resistive sensor. Or graph the ambient noise level with no sensor required. Purchase our sensors and adapters at
or build your own with our detailed instructions. Save, print, share, and export your data and graphs. Precision pressure measurement system and cool teaching aid.

What’s New

Version 1.1.2

- Adds instructions to remove sensor from calibration system to record zero pressure.
- Changes default second calibration value (first is zero) from 30 to 40, and default third calibration value from 20 to 30.
- Updates the calibration button image.

- Stepper controls in the calibration flow are more visible.
- Calibrate button in final calibration stage is more visible.
- Page control in the Help flow is more visible.

Bug Fixes:
- Fixes an error that could cause a crash in the Help flow when changing device volume on the status screen.
- Fixes a bug that could cause the Next button in the calibration flow to be incorrectly enabled before recording a graph, when deleting an existing calibration and re-calibrating.

App Privacy

The developer, Prime Numeral Enterprises, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data
  • Diagnostics
  • Other Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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