# Solis vs ColdAltitude 2

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.

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.

## The numbers

| Metric | Solis | ColdAltitude 2 |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/solis/id1129119591/reviews)** | [1.3 (3 ratings)](https://appshunter.io/ios/app/coldaltitude-2/id1297022907/reviews) |
| Number of ratings | **5** | 3 |
| Positive reviews | **100.0% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Free** | Paid |
| Size | 29 MB | 17 MB |
| Requires iOS | 18.0 | **10.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | +4 |
| Developer | [Jake Runzer](https://appshunter.io/developer/1093710227) | [Adam Kusch](https://appshunter.io/developer/460225501) |

## What reviewers say

### Solis

[App page](https://appshunter.io/ios/app/solis/id1129119591)

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.

**Highlights:** Sunrise and sunset time tracking, Twilight time display (golden/blue hour), Global city support, Event notifications, Today widget, Twilight type explanations

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### ColdAltitude 2

[App page](https://appshunter.io/ios/app/coldaltitude-2/id1297022907)

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.

**Highlights:** Temperature corrected altitude calculation, Store and manage approaches, Search approaches by airport, METAR & TAF data retrieval, AIM formula calculation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Solis free?

Solis is free to download, with no in-app purchases.

### Is ColdAltitude 2 free?

ColdAltitude 2 costs $4.99, with no in-app purchases.

### Which has better reviews, Solis or ColdAltitude 2?

Solis is rated higher. Solis averages 4.8 out of 5 from 5 ratings, while ColdAltitude 2 averages 1.3 from 3 ratings.

### Do Solis or ColdAltitude 2 have ads?

Neither Solis nor ColdAltitude 2 shows ads.

### Which is updated more often, Solis or ColdAltitude 2?

Solis ships an update every 2 months, and ColdAltitude 2 monthly. Most recently, Solis was updated on October 3, 2026 and ColdAltitude 2 on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*