# Next Eclipse vs NADIR

The clearest difference is in-app purchases: NADIR at none against Next Eclipse's 1. NADIR also leads on review sentiment (86% vs 67%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Next Eclipse sells 1 one-off in-app purchase. NADIR asks for nothing beyond the download.

## The numbers

| Metric | Next Eclipse | NADIR |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | **85.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 days | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 14 MB | 3 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Miara](https://appshunter.io/developer/1871192988) | [solal gendrin](https://appshunter.io/developer/1895315169) |

## What reviewers say

### Next Eclipse

[App page](https://appshunter.io/ios/app/next-eclipse-solar-guide/id6784718501)

Prepare for the total solar eclipse on August 12, 2026. Get local visibility, countdowns, and weather estimates to plan your viewing experience. Optional premium features offer advanced planning tools and reminders.

**Highlights:** Countdown to solar eclipse, Local visibility overview, Eclipse type and obscuration estimate, Maximum eclipse time, Viewing chance estimate, Cloud cover and rain chance guidance, Basic solar viewing safety

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 2026 Lifetime | $3.99 | one-time |


### NADIR

[App page](https://appshunter.io/ios/app/nadir/id6788036137)

This app helps you optimize your home's temperature by comparing indoor and outdoor conditions hour by hour. It provides precise recommendations on when to open and close windows for natural cooling without air conditioning.

**Highlights:** Hourly indoor/outdoor temperature comparison, Daily recommended window opening times, 30-hour projected temperature graph, Open/close window alerts, Home thermal physics explanations, Home screen widgets

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

**In-app purchases:** none


## Frequently asked questions

### Is Next Eclipse free?

Next Eclipse is free to download, with in-app purchases available.

### Is NADIR free?

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

### Do Next Eclipse or NADIR have ads?

Neither Next Eclipse nor NADIR shows ads.

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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.*