Solis vs ColdAltitude 2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solis
Track sunrise, sunset, and twilight times globally with visually appealing gradient displays. Receive notifications for key solar events and access golden and blue hour times for photography. A simple widget provides at-a-glance information.
- Sunrise and sunset time tracking
- Twilight time display (golden/blue hour)
- Global city support
- Event notifications
- Today widget
- Twilight type explanations
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Sunrise, sunset, and twilight time time-tracker - Solis shows you when it gets dark or light in any city around the world with its beautiful gradient. - Setup notifications for all the important sun events so you never get caught out in the dark again. - See the times of golden and blue hour for photography with the perfect light. - Simple today widget to know at a glance when the next sunrise, sunset, first light, or last light occurs. - Learn about the three different types of twilight and find out how they affect the light in the sky.
ColdAltitude 2
Calculate temperature-corrected approach altitudes for aviation. Input field elevation and temperature to get corrected altitudes, with options to store, edit, and retrieve approaches for future use. Also provides METAR and TAF data for approach airports.
- Temperature corrected altitude calculation
- Store and manage approaches
- Search approaches by airport
- METAR & TAF data retrieval
- AIM formula calculation
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ColdAltitude enables you to easily calculate multiple temperature corrected approach altitudes. Enter the field elevation and temperature, then any desired altitudes to be corrected. The app does all the calculations and rounding for you. Store, edit and move around your approaches for future use! Enter your anticipated approaches pre-flight for instant calculation airborne. Search for your stored approaches by airport. Obtain METAR & TAF for the approach airport. Set the temperature from the METAR by pressing a button. Uses the formula from the AIM - same calculations used by the Royal Canadian Air Force and in the USA. Use as a reference/guide only. Fly Safe!
Screenshots
Verdict
The clearest difference is review sentiment: Solis at 100% against ColdAltitude 2's 25%. Solis also leads on price (Free vs $4.99) and rating (4.8 vs 1.3). ColdAltitude 2's advantage is update cadence (monthly vs every 2 months) and iOS requirement (10.0 vs 18.0). On ratings volume, ads, 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
Solis is free to download; ColdAltitude 2 costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Solis holds the better App Store score, 4.8 against 1.3. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 100% of Solis's written reviews are positive against 25% of ColdAltitude 2's.
Solis ships an update every 2 months, ColdAltitude 2 monthly. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.
| Parameter | Solis | ColdAltitude 2 |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 4.8 (5 ratings) — better | 1.3 (3 ratings) |
| Positive reviews | 100.0% of reviews — better | 25.0% of reviews |
| Number of ratings | 5 — better | 3 |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 29 MB | 17 MB |
| Age rating | 4+ | +4 |
| Developer | Jake Runzer | Adam Kusch |
Customer experience
Solis
ColdAltitude 2
In-app purchases
Solis
No in-app purchases
ColdAltitude 2
No in-app purchases
