Sputnik! vs Chess Clock App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sputnik!
Track the International Space Station and bright satellites with precise timing and location data. Get second-by-second countdowns, set reminders, and view satellite paths in the night sky. Supports offline calculations and sharing sightings.
- Accurate satellite and ISS sighting predictions
- Starlink satellite train detection
- Second-by-second countdowns
- Sighting reminders
- Compass direction and elevation display
- Night sky path visualization
- Offline calculations
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Sputnik! is an easy to use tool for predicting when the International Space Station will pass by your location or when a bright satellite will be visible in the skies above. Sputnik! features: - Predictions of satellite and ISS sightings accurate to the second. - Detection of Starlink satellite trains. - Second by second countdown to the satellite sighting. - Set reminders of upcoming satellite sightings. - Displays compass direction and elevation for your device to easily find the part of the sky where the sighting will occur (requires capable device). - Rotate your device to landscape orientation to show exactly where the satellite will pass in the night sky. - Share sightings via Twitter, Facebook, Mail, Messages and others. - Automatic download of up to date satellite orbital data. - Offline calculations, no need to be connected to the internet once orbital data has been downloaded. - Input your location automatically by GPS, select from a map or enter coordinates manually. - Save your favorite places for easy access. - Audio cues for the last seconds before the satellite passes by. Sputnik! on Apple Watch: - Easily find the next and last sighting at your current location. * Sputnik! is ad-supported *
Chess Clock App
This application functions as a dual-clock timer for two players, ideal for games like chess. It precisely tracks each player's move time, ensuring fair play and preventing excessive delays. The timer can count down or up, and features a pause function for both players.
- Dual-player time tracking
- Count down or count up timer
- Pause functionality
- Background operation
- Individual time settings
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A chess clock consists of two connected clocks which can't run at the same time. Use it as a game clock to measure the time used by two players for their moves e.g. in game of chess. Stopping one clock will start the other one. The purpose is to keep track of the total time each player takes for his or her own moves, and ensure that neither player overly delays the game. Features: - choose the same time for both players or individually - count the time down or up - pause the clock for both players - runs in the background while the app is closed - support for the iPhone 6 and 6+
Screenshots
Verdict
The clearest difference is review sentiment: Sputnik! at 92% against Chess Clock App's 0%. Sputnik! also leads on price (Free vs $0.99) and rating (4.7 vs 1.0). Chess Clock App's advantage is in-app purchases (none vs 1). On ads, 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
Sputnik! is free to download; Chess Clock App costs $0.99 up front. Sputnik! sells 1 one-off in-app purchase. Chess Clock App asks for nothing beyond the download.
Sputnik! holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Sputnik! has 731 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 92% of Sputnik!'s written reviews are positive against 0% of Chess Clock App's.
Sputnik! ships an update every 5 months, Chess Clock App every 11 months. The most recent releases landed on October 2, 2026 and September 16, 2026 respectively.
| Parameter | Sputnik! | Chess Clock App |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.7 (731 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 92.2% of reviews — better | 0.0% of reviews |
| Number of ratings | 731 — better | 1 |
| Update frequency | Every 5 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 35 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Applicate Ltd | Piet Jonas |
Customer experience
Sputnik!
Chess Clock App
Bugs and requests
Sputnik!
Reported bugs
3 issues- App reporting 'No Sightings' for all categories
- Null check errors when selecting satellite sightings
- Issues with location settings and data updates
Requested features
4 requests- Add support for more satellite types
- Improve sky chart visualization and orientation
- Provide filtering options (e.g. by elevation, magnitude)
- Implement automatic data updates
Chess Clock App
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sputnik!
- Go ad-free$0.99
Chess Clock App
No in-app purchases
Questions
Is Sputnik! free?
Is Chess Clock App free?
Which has better reviews, Sputnik! or Chess Clock App?
Do Sputnik! or Chess Clock App have ads?
Which is updated more often, Sputnik! or Chess Clock App?
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