LED Ohm Calc vs COLON
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
Read full descriptionHide full description
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!
COLON
A minimalist digital clock app that focuses on displaying the time in a large, clear format. Customize colors, fonts, and display options to suit your preferences. It offers essential features without unnecessary complexity.
- Large time display
- Customizable background, text color, and font
- 200 font options
- Show/hide seconds
- Minimalist design
Read full descriptionHide full description
シンプル is ベスト！ 時計以外何もない、時間を大きく表示するだけのアプリ。 位置情報に基づく天候表示、日付表示、アラーム機能、タイマー機能、ウィジェット等々・・・ 最近の時計アプリはこれらの機能がスタンダードになりつつあります。しかし、 「時計アプリにそこまで求めてないよ！時間を大画面で確認できればそれで良いんだよ！」 という方もまた、いらっしゃると思います。 そんな方ためのシンプルでミニマルな時計アプリがCOLONです。 【機能・特徴】 ・時計の背景色、文字色、フォントを自由にカスタマイズできます。 ・フォントは200種類！ ・秒数の表示/非表示を自由に選択できます。 ・課金、広告一切なし、完全無料で使えます。
Screenshots
Verdict
The clearest difference is price: COLON at Free against LED Ohm Calc's $0.99. COLON also leads on rating (5.0 vs 4.3) and review sentiment (88% vs 64%). LED Ohm Calc's advantage is update cadence (every 10 days vs every 29 months) and ratings volume (6 vs 1). On ads, in-app purchases, device support and iOS requirement 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
COLON 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.
COLON holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: LED Ohm Calc has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 64% of LED Ohm Calc's written reviews are positive against 88% of COLON's.
LED Ohm Calc ships an update every 10 days, COLON every 29 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | LED Ohm Calc | COLON |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.3 (6 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 64.3% of reviews | 87.5% of reviews — better |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 10 days — better | Every 29 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Mimi Apps&technologies | Toshihide Miyake |
Customer experience
LED Ohm Calc
COLON
In-app purchases
LED Ohm Calc
No in-app purchases
COLON
No in-app purchases
