Sputnik! vs Acc Alert
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 *
Acc Alert
Monitor device motion and receive alerts when acceleration surpasses a user-set threshold. This utility app helps track sudden movements.
- Motion force monitoring
- Customizable acceleration limits
- Alerts for exceeding limits
- Device motion tracking
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Watch the motion force on your device and get alarmed when the acceleration exceeds a self defined limit.
Screenshots
Verdict
The clearest difference is review sentiment: Sputnik! at 92% against Acc Alert's 0%. Sputnik! also leads on price (Free vs $0.99) and rating (4.7 vs 1.0). Acc Alert's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 14.0). On ads 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
Sputnik! is free to download; Acc Alert costs $0.99 up front. Sputnik! sells 1 one-off in-app purchase. Acc Alert 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 Acc Alert's.
Sputnik! ships an update every 5 months, Acc Alert every 14 months. The most recent releases landed on October 15, 2026 and October 6, 2026 respectively.
| Parameter | Sputnik! | Acc Alert |
|---|---|---|
| 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 14 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 | 11.0 — better |
| Further details — not scored | ||
| Size | 35 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Applicate Ltd | Piet Jonas |
Customer experience
Sputnik!
Acc Alert
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
Acc Alert
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sputnik!
- Go ad-free$0.99
Acc Alert
No in-app purchases
