Thunderstorm Calculator vs 1Daylight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Thunderstorm Calculator
Measure the distance to a thunderstorm by timing the interval between lightning and thunder. View your storm history to track its movement and toggle between metric and imperial units.
- Lightning and thunder timing
- Distance calculation
- Metric and imperial units
- Storm history tracking
- Apple Watch support
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This application calculates the distance of a thunder storm by measuring the time between a lightning and the corresponding thunder. How to use: - When you see the lightning press the 'Lightning' button. - Wait until you hear the thunder and press the 'Thunder' button. - Tap the distance to toggle between metric and imperial units. - With the help of the history list you can see whether the storm comes closer and moves away. Background: The speed of light is much faster than the speed of sound. By measuring the time between the lightning and corresponding thunder one can easily approach the distance by multiplying the duration with the speed of sound. Apple Watch version: - distance calculation - history list - metric and imperial units - has a Check for a quick start
1Daylight
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Daylight and twilight information on selected date and location. Details for selected date and full year daylight for selected location.
Screenshots
Verdict
The clearest difference is price: 1Daylight at Free against Thunderstorm Calculator's $0.99. 1Daylight also leads on update cadence (every 6 months vs every 33 months) and iOS requirement (12.0 vs 15.6). Thunderstorm Calculator's advantage is ads (none vs shown) and chart position (#151 vs unranked). On 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
1Daylight is free to download; Thunderstorm Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Thunderstorm Calculator ships an update every 33 months, 1Daylight every 6 months. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.
| Parameter | Thunderstorm Calculator | 1Daylight |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 33 months | Every 6 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #151 — better | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Piet Jonas | 1Juhler ApS |
In-app purchases
Thunderstorm Calculator
No in-app purchases
1Daylight
No in-app purchases
Questions
Is Thunderstorm Calculator free?
Is 1Daylight free?
Do Thunderstorm Calculator or 1Daylight have ads?
Which is updated more often, Thunderstorm Calculator or 1Daylight?
Other comparisons
