# Moon Phase Keeper vs Synodic

The clearest difference is price: Synodic at Free against Moon Phase Keeper's $2.99. Synodic also leads on update cadence (daily vs every 9 days). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Synodic is free to download; Moon Phase Keeper costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Moon Phase Keeper ships an update every 9 days, Synodic daily. The most recent releases landed on October 22, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Moon Phase Keeper | Synodic |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/synodic/id6787108404/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Daily** |
| Monetization | — | Free |
| Size | 3 MB | 18 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Huseyin Bagana](https://appshunter.io/developer/1537624907) | [Siddhartha Varma](https://appshunter.io/developer/1458285631) |

## What reviewers say

### Moon Phase Keeper

[App page](https://appshunter.io/ios/app/moon-phase-keeper/id6758664879)

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

**In-app purchases:** none


### Synodic

[App page](https://appshunter.io/ios/app/synodic/id6787108404)

This minimalist app precisely tracks the real-time alignment of the sun, earth, and moon with fluid, responsive graphics. It offers a tiny footprint and absolute privacy, bringing the night sky to your device without clutter or tracking.

**Highlights:** Precise sun, earth, moon alignment tracking, Fluid, responsive Metal graphics, Tiny 1.5 MB footprint, Absolute privacy: no ads, no tracking, Real-time celestial body alignment

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

**In-app purchases:** none


## Frequently asked questions

### Is Moon Phase Keeper free?

Moon Phase Keeper costs $2.99, with no in-app purchases.

### Is Synodic free?

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

### Do Moon Phase Keeper or Synodic have ads?

Neither Moon Phase Keeper nor Synodic shows ads.

### Which is updated more often, Moon Phase Keeper or Synodic?

Moon Phase Keeper ships an update every 9 days, and Synodic daily. Most recently, Moon Phase Keeper was updated on October 22, 2026 and Synodic on October 29, 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.*