# Solis vs HD Flight Log

The clearest difference is in-app purchases: Solis at none against HD Flight Log's 2. Solis also leads on iOS requirement (9.0 vs 26.0). HD Flight Log's advantage is update cadence (weekly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. HD Flight Log sells 2 in-app purchases, starting at $2.99 per month. Solis asks for nothing beyond the download.

Solis ships an update every 2 months, HD Flight Log weekly. The most recent releases landed on September 16, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Solis | HD Flight Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/solis/id1129119591/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | — |
| Size | 59 MB | 5 MB |
| Requires iOS | **9.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jake Runzer](https://appshunter.io/developer/1093710227) | [HD Aviation Ltd.](https://appshunter.io/developer/1895956432) |

## 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

**In-app purchases:** none


### HD Flight Log

[App page](https://appshunter.io/ios/app/hd-flight-log/id6765058459)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flight Log Monthly | $2.99 | per month |
| Flight Log Annual | $8.99 | per year |


## Frequently asked questions

### Is Solis free?

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

### Is HD Flight Log free?

HD Flight Log is free to download, with in-app purchases available.

### Do Solis or HD Flight Log have ads?

Neither Solis nor HD Flight Log shows ads.

### Which is updated more often, Solis or HD Flight Log?

Solis ships an update every 2 months, and HD Flight Log weekly. Most recently, Solis was updated on September 16, 2026 and HD Flight Log on September 15, 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.*