Alt vs Sirius Navigator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Alt
This app calculates your precise altitude above sea level using your device's barometer or GPS. It offers a realistic, retro design and automatically calibrates for local atmospheric pressure, with optional manual calibration for advanced users.
- Barometer-based altitude calculation
- GPS fallback for devices without barometer
- Automatic local pressure calibration
- Optional user calibration
- Retro-style interface
- Precise height above sea level
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Alt-O-Meter uses the barometer (air pressure sensor) in your late-model iPhone or iPad to calculate your precise height above sea level. Great for hiking, skiing, driving through mountain passes, flying, and more! • Reads ambient air pressure for a more precise reading than GPS. • Realistic, retro style. Looks like a classic airplane's altimeter! • Automatically calibrates for local atmospheric pressure. • ...also allows precise user calibration (optional; for advanced users) • Uses GPS hardware in devices that lack a barometer. • Completely free! No ads or in-app purchases.
Sirius Navigator
This app provides navigational tools including a compass, barometer, and altitude readings. It also offers easy access to your phone's light control for added convenience.
- Magnetic and True North compass
- Location data
- Altitude measurement
- Barometer readings
- Phone light control
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Sirius Navigator application integrates your phone navigational compass (Magnetic and True North), location data, altitude and barometer measurements. It also provides you easy access to phone light control.
Screenshots
Verdict
The clearest difference is review sentiment: Sirius Navigator at 100% against Alt's 76%. Sirius Navigator also leads on rating (4.8 vs 4.5) and update cadence (every 6 months vs every 15 months). On price, ratings volume, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sirius Navigator holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 8 and 9 respectively. Written reviews point the same way: 76% of Alt's written reviews are positive against 100% of Sirius Navigator's.
Alt ships an update every 15 months, Sirius Navigator every 6 months. Both last shipped on November 6, 2026.
| Parameter | Alt | Sirius Navigator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (8 ratings) | 4.8 (9 ratings) — better |
| Positive reviews | 76.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 8 | 9 — better |
| Update frequency | Every 15 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 11.1 — better |
| Further details — not scored | ||
| Size | 3 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Joshua Hinman | Oleg Baev |
Customer experience
Alt
Sirius Navigator
In-app purchases
Alt
No in-app purchases
Sirius Navigator
No in-app purchases
Questions
Is Alt free?
Is Sirius Navigator free?
Which has better reviews, Alt or Sirius Navigator?
Do Alt or Sirius Navigator have ads?
Which is updated more often, Alt or Sirius Navigator?
Other comparisons
