Comparison

Zinc Counter and Tracker vs Sun Light

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

Head to head
About

Zinc Counter and Tracker

Read full description

If you're vegan or vegetarian, pregnant or breastfeeding use this app to avoid the effects of zinc deficiency. Zinc is critical for a healthy immune system, wound healing, cell division, growth, and metabolism, and protects against many diseases including cardiovascular disease, diabetes, arthritis, skin diseases, dementia and Parkinson's disease. Zinc deficiency in pregnancy and childhood impairs growth and development. Deficiency in older adults can impair wound healing and brain and mental health. Set your target daily zinc intake based on guidance provided in the app and your preferences for weights of food (g or oz). Record food and beverage consumption using dictation, search, or by favoriting foods, and using the serving sizes provided, which can be changed at any time. Tap the notepad to add notes. Compare the zinc content of different foods by tapping the Compare button on the "Foods" screen. Monitor daily and long-term progress, export data to share with healthcare providers, synchronize data with other First Line Medical Communications Ltd nutrient counter apps, and share data with Apple's HealthKit. Add your own foods and recipes and change serving sizes to personalize the app's 400-item database for you. All food and beverage popups indicate whether the item is a plant, good prebiotic, probiotic or ultra-processed food (UPF) to inform a healthy diet and whether they are high or low FODMAP per serving where data are available to support people with irritable bowel syndrome (IBS). Useful lists show zinc content of foods per 1oz or 100g and serving, which can be toggled from high to low & low to high. Also useful UPF, unprocessed plant, prebiotic, probiotic, high & low FODMAP food lists.

About

Sun Light

Track your daily sunlight exposure with this simple app. It uses your Apple Watch data to fill a daily progress ring, track streaks, and show your history. Enjoy a straightforward approach to monitoring your time spent outdoors.

Highlights
  • Daily daylight progress ring
  • Streak tracking
  • 7-day history chart
  • Morning, afternoon, and evening breakdown
  • Custom daily goal
  • Sunrise and sunset times
  • Home and lock screen widgets
Features
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Get outside. Sun Light does the rest. Sun Light turns your daily sunlight into a simple ring, a streak, and a clear picture of when you actually got your light — morning, afternoon, or evening. Most people get less daylight than they think. Sun Light makes it visible in one glance, from your home screen or your wrist. WHAT YOU GET • Daily daylight ring and streak • Morning light window — see your first daylight of the day against sunrise • Morning, afternoon and evening breakdown • 7-day history chart • Shareable daily card • Custom daily goal • Sunrise and sunset times • Home screen and lock screen widgets • Apple Watch app and complications HOW TRACKING WORKS With an Apple Watch, daylight is recorded automatically — nothing to start or stop. Apple Watch writes Time in Daylight to Apple Health and Sun Light reads it. Without an Apple Watch, use a Sun Session: tap start when you head outside, tap stop when you come back. Sun Light saves those minutes to Apple Health too. Automatic tracking requires Apple Watch Series 6 or later, Apple Watch SE (2nd generation), or Apple Watch Ultra, on watchOS 10 or later. PRIVATE BY DESIGN No account. No server. No analytics. No ads. Your daylight data stays in Apple Health on your devices. SUN LIGHT PRO Sun Light is free, and everything above stays free — including the shareable daily card. Pro adds your morning light window history and unlimited history beyond the last seven days. 7-day free trial, then $24.99/year — or $49.99 once for lifetime access. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Zinc Counter and Tracker4 screens
Sun Light3 screens

Verdict

The call

The clearest difference is price: Sun Light at Free against Zinc Counter and Tracker's $2.99. Sun Light also leads on update cadence (every 8 days vs every 5 weeks). Zinc Counter and Tracker's advantage is in-app purchases (none vs 3). On ads, 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

Sun Light is free to download; Zinc Counter and Tracker costs $2.99 up front. Sun Light sells 3 in-app purchases, starting at $24.99 per year. Zinc Counter and Tracker asks for nothing beyond the download.

UpkeepUpdate frequency

Zinc Counter and Tracker ships an update every 5 weeks, Sun Light every 8 days. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Zinc Counter and Tracker versus Sun Light: the parameters behind the verdict, then further details
ParameterZinc Counter and TrackerSun Light
Price$2.99Free — better
Rating—4.7 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 5 weeksEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS18.617.0 — better
Further details — not scored
Size12 MB6 MB
Age rating12+4+
DeveloperFirst Line Medical Communications LtdJAMES JAY QUACKENBUSH

In-app purchases

None

Zinc Counter and Tracker

No in-app purchases

3 purchases

Sun Light

Subscriptions1
  • Sun Light Pro7 Days trial$24.991 Year
One-time2
  • Tip$4.99
  • Sun Light Pro Lifetime$49.99

Questions

Is Zinc Counter and Tracker free?
Zinc Counter and Tracker costs $2.99, with no in-app purchases.
Is Sun Light free?
Sun Light is free to download, with in-app purchases available.
Do Zinc Counter and Tracker or Sun Light have ads?
Neither Zinc Counter and Tracker nor Sun Light shows ads.
Which is updated more often, Zinc Counter and Tracker or Sun Light?
Zinc Counter and Tracker ships an update every 5 weeks, and Sun Light every 8 days. Most recently, Zinc Counter and Tracker was updated on October 14, 2026 and Sun Light on October 24, 2026.

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