LED Ohm Calc vs Lump
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LED Ohm Calc
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.
- 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
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Isn't LED resistor calculation troublesome? When calculating LED resistors, you may find it challenging due to the following: 1.The variety of power supply voltages and microcontroller output voltages 2.Voltage values with decimals (e.g., 3.5–3.7V for blue and white LEDs) 3.Current value calculations 4.Calculations involving multiple LEDs 5.Power consumption (wattage) calculations Features of this App This app simplifies complex calculations using an intuitive slide bar and a text field for manual input. Specifications 1.Power Supply Voltage The slide bar allows settings up to 12V, but you can input higher values using the text field. 2.LED Ratings The slide bar has limits of 4.0V and 50mA, but the text field allows you to input values without restrictions. 3.Closing the Numeric Keypad To close the keypad, press the [Done] button. Share Your Feedback While we may not be able to address every request, we welcome your suggestions and feedback. If you enjoy the app, please consider leaving a review!
Lump
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Display the contents of (almost) any file in hexadecimal and ASCII or UTF-8. Useful for programmers, experimenters, and explorers. Handles huge files easily.
Screenshots
Verdict
The clearest difference is price: Lump at Free against LED Ohm Calc's $0.99. LED Ohm Calc's advantage is iOS requirement (15.6 vs 18.6). On update cadence, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Lump is free to download; LED Ohm Calc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
LED Ohm Calc ships an update every 10 days, Lump every 3 weeks. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.
| Parameter | LED Ohm Calc | Lump |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.3 (6 ratings) — better | — |
| Positive reviews | 64.3% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 10 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 2 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Mimi Apps&technologies | David Rifkind |
In-app purchases
LED Ohm Calc
No in-app purchases
Lump
No in-app purchases
Questions
Is LED Ohm Calc free?
Is Lump free?
Do LED Ohm Calc or Lump have ads?
Which is updated more often, LED Ohm Calc or Lump?
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