# Sig Fig Tutor vs Functional Groups

The clearest difference is in-app purchases: Sig Fig Tutor at none against Functional Groups's 1. Sig Fig Tutor also leads on iOS requirement (12.0 vs 15.0). Functional Groups's advantage is update cadence (every 4 months vs every 49 months). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Functional Groups sells 1 one-off in-app purchase. Sig Fig Tutor asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Sig Fig Tutor against 4.9 for Functional Groups. Both are backed by a comparable volume of ratings — 31 and 21 respectively. Written reviews are what separate them: 95% of Sig Fig Tutor's written reviews are positive against 100% of Functional Groups's.

Sig Fig Tutor ships an update every 49 months, Functional Groups every 4 months. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Sig Fig Tutor | Functional Groups |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (31 ratings)](https://appshunter.io/ios/app/sig-fig-tutor/id1460598554/reviews) | **[4.9 (21 ratings)](https://appshunter.io/ios/app/functional-groups/id1670252638/reviews)** |
| Number of ratings | **31** | 21 |
| Positive reviews | 95.5% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 49 months | **Every 4 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 54 MB | 17 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Cheryl Montgomery](https://appshunter.io/developer/611176285) | [Clarity Applications](https://appshunter.io/developer/1646120472) |

## What reviewers say

### Sig Fig Tutor

[App page](https://appshunter.io/ios/app/sig-fig-tutor/id1460598554)

Master significant figures with this educational tool. Learn the rules, practice identifying sig figs in measurements, and apply them to calculations involving multiplication, division, addition, and subtraction.  It helps determine the correct way to report final answers.

**Highlights:** Learn significant figure rules, Practice identifying sig figs, Estimate answers with multiplication/division, Estimate answers with addition/subtraction, Determine reporting rules for final answers, Challenges for skill assessment

**Features:** macOS Compatibility

**In-app purchases:** none


### Functional Groups

[App page](https://appshunter.io/ios/app/functional-groups/id1670252638)

Master organic chemistry functional groups through an engaging and interactive learning experience. Ideal for students in introductory or advanced courses, MCAT prep, and A-Level chemistry, this app covers dozens of essential groups with practice modes and progress tracking.

**Highlights:** 25+ basic and advanced functional groups, 300+ organic compounds, Multiple practice modes, Customizable study groups, Personalized review, Reference table and definitions, Progress tracking with achievements

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $9.99 | one-time |


## Frequently asked questions

### Is Sig Fig Tutor free?

Sig Fig Tutor is free to download, with no in-app purchases.

### Is Functional Groups free?

Functional Groups is free to download, with in-app purchases available.

### Which has better reviews, Sig Fig Tutor or Functional Groups?

Functional Groups is rated higher. Sig Fig Tutor averages 4.8 out of 5 from 31 ratings, while Functional Groups averages 4.9 from 21 ratings.

### Do Sig Fig Tutor or Functional Groups have ads?

Neither Sig Fig Tutor nor Functional Groups shows ads.

### Which is updated more often, Sig Fig Tutor or Functional Groups?

Sig Fig Tutor ships an update every 49 months, and Functional Groups every 4 months. Most recently, Sig Fig Tutor was updated on October 6, 2026 and Functional Groups on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*