# DrPhos' Significant Figures — Count Sig Figs Easily

> Count Sig Figs Easily (iPhone/iPad app by Monte L Helm.)

- Source: https://appshunter.io/ios/app/drphos-significant-figures/id6747910724 (this page in markdown: same URL + `.md`)
- Developer: [Monte L Helm](https://appshunter.io/developer/1715082616)
- Category: Education, Utilities
- Price: $0.99 with in-app purchases
- Age rating: 4+
- Requires: iOS 18.5 · 9 MB
- Languages: American English
- Released: 2025-07-25
- Data updated: 2026-07-28
- User reviews in markdown: https://appshunter.io/ios/app/drphos-significant-figures/id6747910724/reviews.md

## What is DrPhos' Significant Figures?

Master significant figures with ease — and unlock powerful chemistry tools as you go.

Start free with the Sig Fig Counter — a simple, accurate way to evaluate significant figures for chemistry, physics, and lab work. Built by a chemistry professor for real classroom use.

Unlock additional tools when you’re ready:
• Molar Mass Calculator — Instantly calculate molecular weights
• Stoichiometry Solver — Automate moles, mass, and volume calculations
• Reaction Balancer — Balance chemical equations with one tap
• pH and Kinetics Calculators — For acids, bases, and rate laws
• Ionic Compound Builder — Name compounds and build formulas
• General Naming Helper — Recognize covalent, binary, and ionic rules
• Quadratic Solver — Handy for kinetics and physical chemistry

Whether you’re a student, tutor, or instructor, this app is designed to make chemistry faster, cleaner, and more accurate — with no ads and no clutter.

Used by students, built by a professor.

## Pricing and in-app purchases

Base price: $0.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Science Calculator | $0.99 | one-time |
| Kinetics Calculator | $0.99 | one-time |
| Significant Figures Counter | Free | one-time |
| Reaction Balancer | $0.99 | one-time |
| Ionic Compound Builder | $0.99 | one-time |
| Molar Mass Calculator | $0.99 | one-time |
| Solution Concentrations | $0.99 | one-time |
| General Chemistry Naming | $0.99 | one-time |
| Stoichiometry | $0.99 | one-time |
| Quadratic Equation Solver | $0.99 | one-time |



## Version history (last 2 releases)

### 3.0 — 2025-07-29

• New split-view layout for iPad
• Updated gradient background for a modern look
• Streamlined navigation experience
• App Store review prompt now only appears after returning to the main menu
• Bug fixes and performance improvements

### 1.0 — 2025-07-25

No release notes.

## More apps by Monte L Helm

- [DrPhos' Molar Mass](https://appshunter.io/ios/app/drphos-molar-mass/id6471319631)
- [Ionic Compound Builder](https://appshunter.io/ios/app/ionic-compound-builder/id6472619902)
- [DrPhos' Ionic Compounds](https://appshunter.io/ios/app/drphos-ionic-compounds/id6473097401)
- [DrPhos' Reaction Balancer](https://appshunter.io/ios/app/drphos-reaction-balancer/id6474077005)
- [DrPhos' Stoichiometry](https://appshunter.io/ios/app/drphos-stoichiometry/id6475633178)
- [DrPhos' GenChem Naming](https://appshunter.io/ios/app/drphos-genchem-naming/id6476617346)

All apps by Monte L Helm: https://appshunter.io/developer/1715082616

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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 2026-07-28.*