# FunctionCalc vs Hidden calc

The clearest difference is price: Hidden calc at Free against FunctionCalc's $0.99. Hidden calc also leads on iOS requirement (15.8.3 vs 26.2). FunctionCalc's advantage is ads (none vs shown). On update cadence, in-app purchases and device support there is nothing between them.

Hidden calc is free to download; FunctionCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FunctionCalc ships an update every 8 days, Hidden calc every 2 weeks. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | FunctionCalc | Hidden calc |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (13 ratings)](https://appshunter.io/ios/app/functioncalc/id1455028714/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 8 days** | Every 2 weeks |
| Monetization | Paid | — |
| Size | 2 MB | 35 MB |
| Requires iOS | 26.2 | **15.8.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lawler Innovations, Inc](https://appshunter.io/developer/1455028713) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## 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


### Hidden calc

[App page](https://appshunter.io/ios/app/hidden-calc/id6502871727)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FunctionCalc free?

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

### Is Hidden calc free?

Hidden calc is free to download, with no in-app purchases.

### Do FunctionCalc or Hidden calc have ads?

Hidden calc shows ads; FunctionCalc does not.

### Which is updated more often, FunctionCalc or Hidden calc?

FunctionCalc ships an update every 8 days, and Hidden calc every 2 weeks. Most recently, FunctionCalc was updated on September 23, 2026 and Hidden calc on September 24, 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.*