Comparison

Daylights vs Growing Degree Days Tracker

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

Head to head
About

Daylights

Visualize daylight and night hours globally with three distinct styles. Explore how time zones and daylight saving changes affect your location's light cycles.

Highlights
  • Global daylight visualization
  • Three distinct visualization styles
  • Explore polar night and midnight sun
  • Daylight saving time impact simulation
  • Time zone shift simulation
Features
Read full description

Daylights is your calendar for daylight and night-dark hours around the year, all over the globe. It offers three alternative daylight visualization styles, allowing you to choose whichever feels the most intuitive to you: • The Classic: the 12-hour clock alternates between daylight and night-dark, whichever is shorter. • The Light: the 12-hour clock always shows daylight, overlapping with itself when necessary. • The Magic: a 24-hour clock shows the full day, and highlights the "magic hours" around sunrise and sunset! You can pick any location on the planet to look at the interplay of the polar night and the midnight sun at the big latitudes. And finally, you can see how the light and dark hours would shift in your hometown if daylight saving time became the permanent state of things or was removed altogether, or if they decided to move to the next or previous time zone.

About

Growing Degree Days Tracker

Track seasonal development and blooming phases using temperature-based indicators like GTS and GDD. Ideal for farmers, gardeners, and beekeepers to understand nature's progression based on accumulated heat, not just calendar dates.

Highlights
  • Automatic location detection
  • Daily updated temperature sums (GTS/GDD)
  • Bloom calendar with progress indicator
  • Monitor multiple locations
  • Location-based seasonal development view
Features
Read full description

How much warmth has accumulated at your location? Grassland Temperature Sum shows a temperature-based guide for beekeepers and gardeners who want to put plant development into context. Choose a location and follow its GTS since January 1. The calculation uses the mean of four daily OpenWeather temperature readings. Positive values count with a factor of 0.5 in January, 0.75 in February and 1.0 from March onwards. Growing Degree Days are also shown, using a base of 10°C/50°F. View the yearly curve and compare it with the previous year when those weather records are available. The bloom calendar lists plants by their stored GTS guidelines for flowering start. The seasons wheel shows a typical Central European calendar reference, not observed seasons at your location. Use the Apple Watch app to view the temperature sum, or the larger iPad view to browse the bloom calendar. You can edit or delete saved locations. Location access and subscriptions New users need a subscription. Annual plans support up to three or ten saved locations. People who bought the app before it became a free download retain access to one location. Available prices and subscription periods are shown in the app. Subscriptions renew automatically unless cancelled. These are calculated weather indicators, not measurements taken by the app or confirmed plant observations. Local conditions, species and sowing dates affect actual flowering. OpenWeather calculations can differ from station measurements. The app does not determine a binding fertilization or sowing date. Choose a location and follow its accumulated warmth. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Daylights4 screens
Growing Degree Days Tracker4 screens

Verdict

The call

The clearest difference is rating: Daylights at 4.6 against Growing Degree Days Tracker's 3.0. Daylights also leads on in-app purchases (none vs 2) and review sentiment (67% vs 33%). Growing Degree Days Tracker's advantage is update cadence (weekly vs every 6 months). On price, ads and device support 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

Both are free to download. Growing Degree Days Tracker sells 2 in-app purchases, starting at $3.99 per year. Daylights asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Daylights holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Daylights has 55 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of Daylights's written reviews are positive against 33% of Growing Degree Days Tracker's.

UpkeepUpdate frequency

Daylights ships an update every 6 months, Growing Degree Days Tracker weekly. Both last shipped on October 24, 2026.

Scorecard7 real differences · 3 level
Daylights versus Growing Degree Days Tracker: the parameters behind the verdict, then further details
ParameterDaylightsGrowing Degree Days Tracker
PriceFreeFree
Rating4.6 (55 ratings) — better3.0 (1 ratings)
Positive reviews66.7% of reviews — better33.3% of reviews
Number of ratings55 — better1
Update frequencyEvery 6 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPod, Apple WatchiPhone, iPad, Apple Watch
Requires iOS12.0 — better18.0
Further details — not scored
Size10 MB3 MB
Age rating4+4+
DeveloperJanne KäkiBernhard Hering

Customer experience

Daylights

All ratings55 ratings
Positive87.3%
Neutral5.5%
Negative7.3%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Growing Degree Days Tracker

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

Daylights

No in-app purchases

2 purchases

Growing Degree Days Tracker

Subscriptions2
  • bis zu drei Standorte$3.991 Year
  • Bis zu zehn Standorte$12.991 Year

Questions

Is Daylights free?
Daylights is free to download, with no in-app purchases.
Is Growing Degree Days Tracker free?
Growing Degree Days Tracker is free to download, with in-app purchases available.
Which has better reviews, Daylights or Growing Degree Days Tracker?
Daylights is rated higher. Daylights averages 4.6 out of 5 from 55 ratings, while Growing Degree Days Tracker averages 3.0 from 1 ratings.
Do Daylights or Growing Degree Days Tracker have ads?
Neither Daylights nor Growing Degree Days Tracker shows ads.
Which is updated more often, Daylights or Growing Degree Days Tracker?
Daylights ships an update every 6 months, and Growing Degree Days Tracker weekly. Most recently, Daylights was updated on October 24, 2026 and Growing Degree Days Tracker on October 24, 2026.

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