---
title: "σT - Reviews, Revenue and Downloads in Malaysia | Apple App Store"
description: "σT is a precision tool for physics students and researchers who need to propagate measurement uncertainties through calculations. Enter your experimental data, and σT handles the error math automatica"
---

# σT — Malaysia

![σT App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/61/d9/8a/61d98a52-5eb0-3a96-1ef6-0d952704e19c/AppIcon-0-0-1x_U007epad-0-1-85-220.jpeg/434x0w.png)

**Developer:** [YARON AMIR BENJAMIN DR. GOLDSTEIN](https://apptail.io/developer/yaron-amir-benjamin-dr-goldstein-oDYvhb)
**Category:** Education
**Rating:** N/A (0 ratings)
**Price:** Free
**Bundle ID:** de.goldsteiny.PhysLabErrorProp
**Store:** Apple App Store
**Country:** Malaysia
**Version:** 1.6 (released 2026-10-08)
**Original Release:** 2025-12-23
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/my/app/app/id6756549182)
**AppTail Page:** [https://apptail.io/app/st-Rixz/malaysia](https://apptail.io/app/st-Rixz/malaysia)

## σT Description
σT is a precision tool for physics students and researchers who need to propagate measurement uncertainties through calculations. Enter your experimental data, and σT handles the error math automatically.


**FIVE ERROR MODES**

Configure uncertainties in your data to match your orignal measurement method:
• Constant — for physical constants and exact values
• Absolute — fixed ±error (ruler measurements, digital readouts)
• Relative — percentage-based uncertainty
• Combined — both absolute and relative components (many typical multimeters)
• Per-Value — individual error for each measurement


**AUTOMATIC PROPAGATION**

Create derived values and watch uncertainties flow through the calculation chain. σT uses Gaussian error-propagation and pre-calculated derivative-based methods to compute propagated errors correctly when combining independently measured variables.

Available operations:
• Basic: add, subtract, multiply, divide, reciprocal
• Functions: exp, ln, sin, cos, normalize
• Statistical & Sample Statistics: mean with standard error, average step width
• Advanced: weighted sums, weighted products, polynomials
• Physics: Lorentz factor (relativistic gamma), Logit sigmoid (Fermi-Dirac statistics)


**INTERACTIVE CHARTS**

Visualize your data with proper error bars. Pinch to zoom, drag to pan, double-tap to auto-fit. Add mathematical function overlays to compare your measurements against theoretical predictions, identify eligible parameter ranges matching your measurements.


**EXPORT YOUR WORK**

• CSV and TSV export for spreadsheets and analysis tools
• High-resolution PNG charts for lab reports
• Complete project files for sharing with classmates or colleagues
• Copy data to clipboard with a swipe and continue in Sheets or Excel with errors in place


**DESIGNED FOR LAB WORK**

σT adapts to your device:
• iPhone: Full-featured portable lab companion
• iPad: Side-by-side layout for efficient data entry
• Mac: Native desktop experience via Catalyst


**YOUR DATA, YOUR DEVICE**

All measurements are stored locally. No account required, no cloud sync, no tracking. σT works completely offline.

## σT Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/3a/04/0c/3a040c8f-acc5-13ac-143e-5c65d88c0cd9/1-projects-overview.png/1260x2736.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/4e/b6/a4/4eb6a42c-7519-6dab-daee-013a69358f01/2-measurement-input.png/1260x2736.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/17/5f/62/175f623a-fc24-7f0d-8481-6271ce8891fe/3-derived_measurements.png/1260x2736.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/29/6b/4d/296b4d6e-c774-fb0f-ac1d-676c622ddd1e/5-charts.png/1260x2736.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/24/8e/1a/248e1af1-f72b-5805-5cc5-60fcb935b6ab/6-charts-overlay.png/1260x2736.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ea/27/59/ea275953-1729-271f-d943-5abda10648fe/4-advanced_functions.png/1260x2736.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/e1/12/b1/e112b161-afc6-1bfa-d8a1-6c05c5b74a5b/7-statistical-depth-series.png/1260x2736.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/75/74/34/75743416-0b72-126d-b56a-6557d65fcde1/8-export-results.png/1260x2736.png)







## σT Available In
- [Azerbaijan](https://apptail.io/app/st-Rixz/azerbaijan)
- [Ecuador](https://apptail.io/app/st-Rixz/ecuador)
- [Japan](https://apptail.io/app/st-Rixz/japan)
- [Kazakhstan](https://apptail.io/app/st-Rixz/kazakhstan)
- [Lebanon](https://apptail.io/app/st-Rixz/lebanon)
- [Malaysia](https://apptail.io/app/st-Rixz/malaysia)
- [Nigeria](https://apptail.io/app/st-Rixz/nigeria)
- [Portugal](https://apptail.io/app/st-Rixz/portugal)
- [Russia](https://apptail.io/app/st-Rixz/russia)

---

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