Thunderstorm Simulator vs Combat Clock 1a
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Thunderstorm Simulator
Create a personalized thunderstorm experience with adjustable rain, thunder, and lightning effects. Customize sound volumes, lightning occurrences, and light colors to relax or fall asleep. Includes a sleep timer and options for background nature sounds.
- Adjustable rain sounds and volume
- Customizable thunder and lightning occurrences
- Screen or camera flash lightning effects
- Background nature sounds
- Sleep timer with fade-out
- Keep Awake mode
- Lightning on Demand control
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Summon a thunderstorm on your mobile device. Relax and fall fast asleep to the sounds of rain and thunder. The screen or camera flashes when lightning strikes.* *Defaults to screen for lightning light effects if camera flash is not available. THUNDERSTORMS • Strong Thunderstorm — Heavy rain with frequent lightning and thunder nearby • Normal Thunderstorm — Steady rain with a full range of lightning and thunder • Weak Thunderstorm — Light rain with occasional lightning and thunder far off • Passing Thunderstorms — Rain and lightning intensity changes as the storms pass SETTINGS Rain • Toggle rain sound effects • Change rain audio: Default, Heavy, Steady, Light, On Tin Roof • Change rain volume Lightning/Thunder • Toggle thunder sound effects • Change thunder volume • Change delay lightning (Wireless audio delay offset) • Toggle delay thunder • Toggle lightning light effects • Change lightning output: Camera Flash, Screen • Change lightning transition effects • Change lightning/thunder occurrence: Default, Occasional, Normal, Frequent • Change color and max brightness of lightning light effects (Screen only) Passing Thunderstorms • Change starting storm for Passing Thunderstorms: Weak, Normal, Strong • Change cycle time for Passing Thunderstorms: 15m, 30m, 60m Background Sounds • Toggle background sounds: Birds, Cicadas, Crickets, Frogs • Change background sounds volume General • Keep Awake to prevent your device from going to sleep so lightning effects remain visible • Select a mode to automatically start when the app opens • Choose a time to automatically stop the selected mode • Choose a time to automatically restart the selected mode when the sleep timer ends, enabling a recurring cycle ADDITIONAL FEATURES • Sleep Timer — Set a timer with a gradual audio fade-out. • Turn Screen Black — Adds a black overlay and sets the device to minimum brightness. Use the Screen Brightness Delay setting to compensate for brightness ramp-up on some devices. Set to 0.25–1 second if lightning effects do not reach peak brightness when thunder is loudest. • Lightning on Demand — Start a storm and use the lightning buttons at the bottom of the screen for manual control. • Bluetooth Support — Connect to Bluetooth speakers. Adjust the Delay Lightning setting to offset wireless audio delay. Please contact me at support@thunderstorm.scottdodson.dev if you experience any issues. I'd love to hear your thoughts and appreciate you taking the time to rate and review the app. I want to continue to improve Thunderstorm Simulator and create a great experience for you and future users. Thank you! —Scott Ad-supported version: https://apps.apple.com/us/app/thunderstorm-simulator-w-ads/id1482707561
Combat Clock 1a
This app replicates a 12-hour analog ship's clock, displaying GPS coordinates, heading, and compass bearing. It features an alarm that rings every half hour based on traditional deck watch shifts. The application is active only in the foreground and does not save or transmit any user data.
- 12-hour analog clock with sweeping second hand
- Displays GPS coordinates
- Shows device heading and compass bearing
- Half-hourly alarm (1-8 bells)
- Foreground active only
- No data saving or transmission
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Combat Clock is a 12-hour analog clock (sweeping second hand) that is a contemporary replica of a WWI/WWII ship's clock used by the US Navy, Coast Guard and other government organizations. Location data is leveraged to display current GPS coordinates, heading and compass bearing that indicates the direction the top of the device (portrait mode) is pointing to (12 is North, 6 South, 3 East and 9 is West). Combat Clock includes an alarm that rings every half hour (1 to 8 bells) based on the old deck watch shift standard of 4 hour. The application is active only when it is in the foreground. No location or personal data is saved or sent from the device. There are no in-application advertisements, or purchases.
Screenshots
Verdict
The clearest difference is review sentiment: Thunderstorm Simulator at 100% against Combat Clock 1a's 56%. Thunderstorm Simulator also leads on rating (4.5 vs 3.9). Combat Clock 1a's advantage is ratings volume (69 vs 2) and update cadence (every 2 months vs every 4 months). On ads, in-app purchases, monetization model 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
Thunderstorm Simulator costs $1.99 and Combat Clock 1a $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Thunderstorm Simulator holds the better App Store score, 4.5 against 3.9. That said, the two scores are not equally well evidenced: Combat Clock 1a has 69 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Thunderstorm Simulator's written reviews are positive against 56% of Combat Clock 1a's.
Thunderstorm Simulator ships an update every 4 months, Combat Clock 1a every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Thunderstorm Simulator | Combat Clock 1a |
|---|---|---|
| Price | $1.99 | $0.99 — better |
| Rating | 4.5 (2 ratings) — better | 3.9 (69 ratings) |
| Positive reviews | 100.0% of reviews — better | 56.3% of reviews |
| Number of ratings | 2 | 69 — better |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 72 MB | 10 MB |
| Age rating | 12+ | 4+ |
| Developer | Scott Dodson | JOHN W GRANHOLM |
Customer experience
Thunderstorm Simulator
Combat Clock 1a
In-app purchases
Thunderstorm Simulator
No in-app purchases
Combat Clock 1a
No in-app purchases
Questions
Is Thunderstorm Simulator free?
Is Combat Clock 1a free?
Which has better reviews, Thunderstorm Simulator or Combat Clock 1a?
Do Thunderstorm Simulator or Combat Clock 1a have ads?
Which is updated more often, Thunderstorm Simulator or Combat Clock 1a?
Other comparisons
