Daylight Tracker vs CalSlashD
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Daylight Tracker
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Daylight helps you become more aware of your time in daylight, so you can build routines that bring balance and energy to your day. In northern countries, especially during darker months, itβs easy to spend most of the day indoors. Daylight helps you notice how much light you actually get and reminds you to go outside when it matters most. With Daylight you can: β’ See your daily and weekly daylight minutes β simple, visual, and motivating. β’ Set your own daylight goal β choose how much time youβd like to spend outside. β’ Get friendly reminders β a gentle nudge if you havenβt reached your goal yet. β’ Sync automatically with Apple Watch β or track manually, no Watch required. β’ Build awareness β small moments in daylight can make a big difference in how you feel. Daylight integrates with Apple Health to read and write your daylight data. All information stays private and secure on your device. Notice your light. Find your rhythm. Feel more balanced.
CalSlashD
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Most calorie trackers hold you to a strict daily limit. Cal/d tracks your daily average instead, so one heavy day doesn't wreck your progress. Set a start date and daily limit, and Cal/d reads dietary energy from Apple Health to show: - Daily Average: total calories since your start date, divided by days elapsed. - Remaining Calories: stay under your limit and you build a surplus to spend whenever you want. - Surplus Goal: surplus divided by daily limit is how many days you've saved. Set a target (say, 3 days). - Countdown to Next 250: a timer until your next 250 calories, expandable to 5 timers ahead (20 with Plus). Don't want to wait? Factor in Active Energy too. A jog raises your surplus and moves you closer to your goal. Log calories and nutrition directly in Cal/d, or keep your current tracker and open it with one tap from a built-in link list. Anything that writes to Apple Health, Cal/d can read. PLUS FEATURES: - Unlimited What-If calorie planning - Unlimited surplus-goal days - All 20 countdown milestones - Custom Stats date ranges longer than 30 days - "Lastβ¦" Stats periods beyond the last 7 days - After-exercise pace comparison - Live Activity on the Lock Screen and Dynamic Island - Calorie checkpoint notifications Cal/d is not medical advice. Consult your doctor before changing your diet.
Screenshots
Verdict
The clearest difference is update cadence: CalSlashD at every 2 days against Daylight Tracker's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Daylight Tracker ships an update every 3 months, CalSlashD every 2 days. The most recent releases landed on October 2, 2026 and October 4, 2026 respectively.
| Parameter | Daylight Tracker | CalSlashD |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 2 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.6 | 18.0 β better |
| Further details β not scored | ||
| Size | 1 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Gijsbert van den Brink | Daniel Hotyanov |
In-app purchases
Daylight Tracker
No in-app purchases
CalSlashD
No in-app purchases
Questions
Is Daylight Tracker free?
Is CalSlashD free?
Do Daylight Tracker or CalSlashD have ads?
Which is updated more often, Daylight Tracker or CalSlashD?
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