# NerdCalc vs UnitFlowPro

The clearest difference is price: NerdCalc at Free against UnitFlowPro's $1.99. NerdCalc also leads on ads (none vs shown) and ratings volume (183 vs 1). UnitFlowPro's advantage is update cadence (every 5 days vs every 19 months) and review sentiment (100% vs 85%). On in-app purchases, device support and iOS requirement there is nothing between them.

NerdCalc is free to download; UnitFlowPro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UnitFlowPro holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: NerdCalc has 183 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 85% of NerdCalc's written reviews are positive against 100% of UnitFlowPro's.

NerdCalc ships an update every 19 months, UnitFlowPro every 5 days. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | NerdCalc | UnitFlowPro |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.8 (183 ratings)](https://appshunter.io/ios/app/nerdcalc/id432781819/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/unitflowpro/id6767599503/reviews)** |
| Number of ratings | **183** | 1 |
| Positive reviews | 84.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 19 months | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 0 MB | 3 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Nidal Fakhouri](https://appshunter.io/developer/432780820) | [James Roche](https://appshunter.io/developer/1896491450) |

## What reviewers say

### NerdCalc

[App page](https://appshunter.io/ios/app/nerdcalc/id432781819)

Perform calculations across binary, hexadecimal, and decimal number bases simultaneously. Easily switch input modes and see results update instantly for all bases. Supports unsigned and 2's complement for negative numbers, along with arithmetic, logic, and bitwise operations.

**Highlights:** Simultaneous base display, Switchable input modes, Unsigned and 2's complement support, Arithmetic operations, Logic operations, Bitwise shifting

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

**In-app purchases:** none


### UnitFlowPro

[App page](https://appshunter.io/ios/app/unitflowpro/id6767599503)

Instantly convert units across numerous categories with real-time updates as you type. Features a clean, dark interface with color-coded units for easy identification. Handles all number types seamlessly.

**Highlights:** Real-time unit conversions, 15+ conversion categories, Color-coded unit design, Smart number handling, Ad-free option via one-time purchase

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

**In-app purchases:** none


## Frequently asked questions

### Is NerdCalc free?

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

### Is UnitFlowPro free?

UnitFlowPro costs $1.99, with no in-app purchases.

### Which has better reviews, NerdCalc or UnitFlowPro?

UnitFlowPro is rated higher. NerdCalc averages 4.8 out of 5 from 183 ratings, while UnitFlowPro averages 5.0 from 1 ratings.

### Do NerdCalc or UnitFlowPro have ads?

UnitFlowPro shows ads; NerdCalc does not.

### Which is updated more often, NerdCalc or UnitFlowPro?

NerdCalc ships an update every 19 months, and UnitFlowPro every 5 days. Most recently, NerdCalc was updated on October 19, 2026 and UnitFlowPro on October 14, 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.*