# Precision Metric - Converter

> Precision Metric - Converter (iPhone/iPad app by Eastchester Group Ltd.)

- Source: https://appshunter.io/ios/app/precision-metric-converter/id6761073914 (this page in markdown: same URL + `.md`)
- Developer: [Eastchester Group Ltd](https://appshunter.io/developer/1884897490)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 45 MB
- Languages: English
- Released: 2026-03-25
- Data updated: 2026-07-01
- User reviews in markdown: https://appshunter.io/ios/app/precision-metric-converter/id6761073914/reviews.md

## What is Precision Metric?

Convert any unit with precision you can trust.

Precision Metric is a fast, accurate unit converter with 234 units across 30 categories. Every calculation uses NIST-verified conversion factors with up to 50-digit internal precision. No ads. No tracking. Works completely offline.

FEATURES:
• 30 categories: Length, Mass, Temperature, Volume, Time, Area, Speed, Pressure, Energy, Force, Torque, Frequency, and more
• Compound unit input — enter values as 5ft 3in or 2lb 8oz
• Batch convert — convert dozens of values at once and share as CSV
• Significant figures mode with dp/sf toggle
• Conversion audit trail — see the exact factor, source, and math
• Industry quick sheets for Cooking, Construction, Engineering, Science, and Medical
• Real-time conversion as you type
• Pair search — type "miles to km" and go straight to converting
• Save favorite conversion pairs
• Haptic feedback on key actions

FREE TO USE:
• 7 everyday categories with common units
• Up to 4 decimal precision
• 5 saved conversions, 10 history entries
• All features except Pro units and extended precision

UPGRADE TO PRO (one-time purchase):
• All 30 categories and 234 units
• Up to 15 decimal precision and sig figs
• Unlimited saves and history
• Batch conversion and CSV export
• Conversion audit trail with NIST sources
• Pay once, yours forever — no subscriptions

BUILT FOR PROFESSIONALS:
• NIST and SI verified conversion factors
• Arbitrary-precision math — no floating-point errors
• Compound units: feet+inches, pounds+ounces, hours+minutes+seconds
• Temperature: Celsius, Fahrenheit, Kelvin, and Rankine
• Every factor traceable to international reference standards

Works offline. No data collected. No ads. No tracking. Your conversions stay on your device.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Precision Metric Pro | $4.99 | one-time |



## Version history (last 2 releases)

### 1.2.2 — 2026-03-29

Performance improvements and bug fixes

### 1.0 — 2026-03-25

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-01.*