# Eclipse Explorer vs Periodic Table Watch

The clearest difference is price: Eclipse Explorer at Free against Periodic Table Watch's $0.99. Eclipse Explorer also leads on update cadence (every 5 days vs every 9 months) and iOS requirement (10.3 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Eclipse Explorer is free to download; Periodic Table Watch costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Eclipse Explorer ships an update every 5 days, Periodic Table Watch every 9 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Eclipse Explorer | Periodic Table Watch |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/eclipse-explorer/id1252295023/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 9 months |
| Monetization | Free | — |
| Size | 47 MB | 6 MB |
| Requires iOS | **10.3** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Joshua Berlin](https://appshunter.io/developer/1252295022) | [Jim Haungs](https://appshunter.io/developer/1498282259) |

## What reviewers say

### Eclipse Explorer

[App page](https://appshunter.io/ios/app/eclipse-explorer/id1252295023)

Explore solar eclipses with detailed circumstances for your location between 1900 and 2100. Features countdown timers, Sun and Moon simulations, and real-time shadow mapping. Overlay weather data to avoid clouds during totality.

**Highlights:** Location-based eclipse circumstances (1900-2100), Countdown timers to eclipse events, Sun and Moon position simulation, Real-time Moon shadow mapping, Satellite and radar weather overlays, Offline map functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### Periodic Table Watch

[App page](https://appshunter.io/ios/app/periodic-table-watch/id1551884849)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Eclipse Explorer free?

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

### Is Periodic Table Watch free?

Periodic Table Watch costs $0.99, with no in-app purchases.

### Do Eclipse Explorer or Periodic Table Watch have ads?

Neither Eclipse Explorer nor Periodic Table Watch shows ads.

### Which is updated more often, Eclipse Explorer or Periodic Table Watch?

Eclipse Explorer ships an update every 5 days, and Periodic Table Watch every 9 months. Most recently, Eclipse Explorer was updated on November 2, 2026 and Periodic Table Watch on November 7, 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.*