LSTclock vs MAX Daylight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LSTclock
This utility app displays local sidereal time for registered locations on iOS, iPadOS, and watchOS. It can also calculate sidereal time and Julian Date for any date and time, and sync locations between devices.
- Local sidereal time display
- Julian Date calculation
- Supports multiple registered locations
- Location sync between iPhone and Apple Watch
- Date and time specific calculations
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LSTclock is an iOS/iPadOS/watchOS app that displays the local sidereal time (LST) at registered location(s). On iOS/iPadOS, it can also calculate LST and Julian Date for any date and time. The list of locations can be synced between iPhone and paired Apple Watch(es).
MAX Daylight
Track remaining daylight and receive sunset notifications. Explore solar data globally, compare locations, and generate reports. Calculate distances to the Equator and poles.
- Real-time sunset time
- Sunset notifications
- Global sunrise/sunset monitoring
- Location comparison
- Distance to Equator/Poles
- Solar data reports
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I wrote this app to help me get home before dark while riding my bicycle. You can see at a glance how much time until sunset, and set notifications for when you are running out of sunlight. Your loved ones will no longer worry or complain. Then I added everything solar but the kitchen sink, just for fun. Not only for your current location, you can monitor sunrise, noon, and sunset anywhere on Earth. You can compare locations, make movies, and generate reports comparing a location you select to places around the globe. Check the distance to your location, the Equator, and the North or South Pole from anywhere on Earth. Quick and easy for its headline purpose, but enough detail to satisfy almost any nerd. Most of the USA is far enough north to have little sunlight in mid-winter, rapid changes in the amount of sunlight in spring and fall, and a glorious abundance in summer. You need this app to keep on top of all that.
Screenshots
Verdict
The clearest difference is rating: MAX Daylight at 4.9 against LSTclock's 3.8. MAX Daylight also leads on review sentiment (94% vs 55%) and update cadence (every 2 weeks vs every 2 months). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MAX Daylight holds the better App Store score, 4.9 against 3.8. That said, the two scores are not equally well evidenced: MAX Daylight has 62 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 55% of LSTclock's written reviews are positive against 94% of MAX Daylight's.
LSTclock ships an update every 2 months, MAX Daylight every 2 weeks. The most recent releases landed on September 26, 2026 and October 14, 2026 respectively.
| Parameter | LSTclock | MAX Daylight |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (10 ratings) | 4.9 (62 ratings) — better |
| Positive reviews | 54.5% of reviews | 93.8% of reviews — better |
| Number of ratings | 10 | 62 — better |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 15 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Tsuyoshi Sawada | Stephen Mykytyn |
Customer experience
LSTclock
MAX Daylight
In-app purchases
LSTclock
No in-app purchases
MAX Daylight
No in-app purchases
Questions
Is LSTclock free?
Is MAX Daylight free?
Which has better reviews, LSTclock or MAX Daylight?
Do LSTclock or MAX Daylight have ads?
Which is updated more often, LSTclock or MAX Daylight?
Other comparisons
