Comparison

Moon Phase Keeper vs Synodic

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Moon Phase Keeper

Features
Read full description

MoonKeeper is your essential companion for tracking lunar phases and planning activities around the moon's cycle. FEATURES: • Real-time Moon Phase Display - See the current moon phase with beautiful, accurate visualizations • Moon Phase Calendar - View past and future moon phases at a glance • Phase Notifications - Get alerts for full moons, new moons, and other significant phases • Crown Calculator - Calculate moon phases for any date • Multiple Themes - Choose from light, dark, and system themes • 34 Languages Supported - Use MoonKeeper in your native language Perfect for: • Photographers planning night shoots • Gardeners following lunar planting calendars • Fishermen tracking the best fishing times • Astronomers and stargazers • Anyone curious about the moon MoonKeeper combines accuracy with elegance, providing everything you need to stay connected with Earth's celestial companion. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ioscorner.com/privacy.html

About

Synodic

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
Read full description

Software today has gotten heavy. It has gotten lazy. Open the App Store and you will see simple utilities that require hundreds of megabytes of space, filled with tracking pixels, unnecessary libraries, and visual clutter. We believe your iPhone deserves better. We believe you deserve better. We did something radical. We went back to the absolute roots of great software engineering. We stripped away the noise, optimized every single byte, and wrote our code by hand. The result is Synodic. Synodic tracks the precise, real-time alignment of the sun, earth, and moon. It does one thing, and it does it with absolute perfection. At just 1.5 megabytes, it occupies virtually zero space on your device, yet it places the entire night sky in the palm of your hand. By utilizing Apple's advanced Metal graphics framework, the interface doesn't just sit there—it feels alive. As you tilt and turn your phone, the lunar lighting shifts smoothly, responding instantly to the movement of your hands. It is fluid, responsive, and incredibly natural. Features: • Pure Engineering: A tiny 1.5 MB footprint that downloads instantly and respects your storage. • Metal Architecture: High-fidelity graphics rendering that mimics the physical behavior of light. • Absolute Privacy: No ads, no user tracking, and no third-party data analytics. Just clean software. Synodic represents what happens when technology meets poetry. It isn't just an app. It is a testament to how elegant software can be when you care about the details. Experience the cosmos, completely weightless.

Screenshots

Moon Phase Keeper4 screens
Synodic4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
Moon Phase Keeper versus Synodic: the parameters behind the verdict, then further details
ParameterMoon Phase KeeperSynodic
Price$2.99Free — better
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 9 daysDaily — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size3 MB18 MB
Age rating4+4+
DeveloperHuseyin BaganaSiddhartha Varma

In-app purchases

None

Moon Phase Keeper

No in-app purchases

None

Synodic

No in-app purchases

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.

Other comparisons