# Envrtrack vs SunSpan

The clearest difference is update cadence: SunSpan at every 2 days against Envrtrack's monthly. Envrtrack's advantage is iOS requirement (14.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Envrtrack ships an update monthly, SunSpan every 2 days. The most recent releases landed on September 29, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Envrtrack | SunSpan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sunspan/id6761731642/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | — | Free |
| Size | 86 MB | 6 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Ensignis](https://appshunter.io/developer/1792623130) | [Mykhailo Chelnokov](https://appshunter.io/developer/1891136089) |

## What reviewers say

### Envrtrack

[App page](https://appshunter.io/ios/app/envrtrack/id6741023606)

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

**In-app purchases:** none


### SunSpan

[App page](https://appshunter.io/ios/app/sunspan/id6761731642)

Visualize an entire year of daylight, sunrise, sunset, and twilight on a single, intuitive chart. Easily inspect daily solar times and phases by tapping or dragging across the visual representation. Offers detailed insights into seasonal changes and astronomical events.

**Highlights:** Full-year daylight chart, Eight-stop twilight gradient, Inspect daily solar times, DST transitions marked, Location picker via map/GPS, Automatic time zone resolution

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

**In-app purchases:** none


## Frequently asked questions

### Is Envrtrack free?

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

### Is SunSpan free?

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

### Do Envrtrack or SunSpan have ads?

Neither Envrtrack nor SunSpan shows ads.

### Which is updated more often, Envrtrack or SunSpan?

Envrtrack ships an update monthly, and SunSpan every 2 days. Most recently, Envrtrack was updated on September 29, 2026 and SunSpan on September 25, 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.*