# LED Ohm Calc vs PDF Studio(Pro)

The clearest difference is update cadence: PDF Studio(Pro) at every 2 days against LED Ohm Calc's every 10 days. PDF Studio(Pro) also leads on iOS requirement (13.0 vs 15.6). LED Ohm Calc's advantage is price ($0.99 vs $2.99). On ads, in-app purchases and device support there is nothing between them.

LED Ohm Calc costs $0.99 and PDF Studio(Pro) $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

LED Ohm Calc ships an update every 10 days, PDF Studio(Pro) every 2 days. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | LED Ohm Calc | PDF Studio(Pro) |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/led-ohm-calc/id390985541/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 2 days** |
| Monetization | Paid | — |
| Size | 2 MB | 42 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mimi Apps&technologies](https://appshunter.io/developer/390985544) | [Hrishi Suthar](https://appshunter.io/developer/1660005858) |

## What reviewers say

### LED Ohm Calc

[App page](https://appshunter.io/ios/app/led-ohm-calc/id390985541)

This utility simplifies calculating LED resistors by handling various voltages, decimal values, and multiple LEDs. It offers intuitive input methods for power supply and LED ratings, making complex calculations straightforward.

**Highlights:** Calculate LED resistors, Handle various power supply voltages, Input decimal LED voltage ratings, Calculate current and wattage, Support for multiple LEDs, Intuitive slide bar and text input

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

**In-app purchases:** none


### PDF Studio(Pro)

[App page](https://appshunter.io/ios/app/pdf-studiopro/id6757748809)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LED Ohm Calc free?

LED Ohm Calc costs $0.99, with no in-app purchases.

### Is PDF Studio(Pro) free?

PDF Studio(Pro) costs $2.99, with no in-app purchases.

### Do LED Ohm Calc or PDF Studio(Pro) have ads?

Neither LED Ohm Calc nor PDF Studio(Pro) shows ads.

### Which is updated more often, LED Ohm Calc or PDF Studio(Pro)?

LED Ohm Calc ships an update every 10 days, and PDF Studio(Pro) every 2 days. Most recently, LED Ohm Calc was updated on October 15, 2026 and PDF Studio(Pro) on October 12, 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.*