# FunctionCalc vs PDF

The clearest difference is price: PDF at Free against FunctionCalc's $0.99. PDF also leads on ratings volume (116 vs 13) and iOS requirement (13.0 vs 26.2). FunctionCalc's advantage is in-app purchases (none vs 3) and review sentiment (100% vs 89%). On rating, update cadence, ads and device support there is nothing between them.

PDF is free to download; FunctionCalc costs $0.99 up front. PDF sells 3 in-app purchases, starting at $0.99 per 7 days. FunctionCalc asks for nothing beyond the download.

FunctionCalc holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: PDF has 116 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 100% of FunctionCalc's written reviews are positive against 89% of PDF's.

FunctionCalc ships an update every 8 days, PDF fortnightly. The most recent releases landed on June 5, 2026 and August 20, 2026 respectively.

## The numbers

| Metric | FunctionCalc | PDF |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (13 ratings)](https://appshunter.io/ios/app/functioncalc/id1455028714/reviews)** | [4.8 (116 ratings)](https://appshunter.io/ios/app/pdf-scanner-converter/id1556704210/reviews) |
| Number of ratings | 13 | **116** |
| Positive reviews | **100.0% of reviews** | 89.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Fortnightly |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 90 MB |
| Requires iOS | 26.2 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lawler Innovations, Inc.](https://appshunter.io/developer/1455028713) | [Nikita Khromov](https://appshunter.io/developer/1545839192) |

## What reviewers say

### FunctionCalc

[App page](https://appshunter.io/ios/app/functioncalc/id1455028714)

This all-in-one utility app helps veterans calculate VA disability benefits, track important dates, and perform everyday calculations. It includes a tip splitter, unit converter, and a powerful calculator with saved formulas.

**Highlights:** VA disability benefit calculator, Date countdown and elapsed time tracker, Tip calculator and bill splitting, Unit and currency converter, Time math and custom formulas, Full calculation history

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

**In-app purchases:** none


### PDF

[App page](https://appshunter.io/ios/app/pdf-scanner-converter/id1556704210)

Easily scan documents and convert images into PDF files directly from your iPhone or iPad. Organize your scanned documents for later use and share them conveniently from anywhere.

**Highlights:** Scan documents on the go, Convert images to PDF, Build single or separate PDFs, Save and share PDFs, Store scanned files for later

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 week | $0.99 | per 7 days |
| 1 month | $1.49 | per month |
| 1 year | $9.99 | per year |


## Frequently asked questions

### Is FunctionCalc free?

FunctionCalc costs $0.99, with no in-app purchases.

### Is PDF free?

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

### Which has better reviews, FunctionCalc or PDF?

FunctionCalc is rated higher. FunctionCalc averages 5.0 out of 5 from 13 ratings, while PDF averages 4.8 from 116 ratings.

### Do FunctionCalc or PDF have ads?

Neither FunctionCalc nor PDF shows ads.

### Which is updated more often, FunctionCalc or PDF?

FunctionCalc ships an update every 8 days, and PDF fortnightly. Most recently, FunctionCalc was updated on June 5, 2026 and PDF on August 20, 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.*