Dark Surf vs ChangeDay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dark Surf
Enhance your browsing experience with a customizable dark theme for Safari. Adjust shade, contrast, saturation, and image settings. Schedule dark mode or set it per-site.
- Customizable dark theme
- Adjustable shade and contrast
- Saturation and image handling
- Scheduling for dark mode
- Per-site theme controls
- Preset themes (Midnight, Warm, AMOLED, Gray)
Read full descriptionHide full description
Dark Surf gives Safari a thoughtful dark mode for every website. Instead of painting over pages, Dark Surf reads each site’s own design and rebuilds it in the dark. Backgrounds and cards turn deep and calm, text stays crisp, and the colors that carry meaning, like buttons, links, warnings and highlights, keep their character. Photos stay natural. SMART BY DEFAULT • Leaves websites that already have a dark design alone • Keeps dark logos, icons and formulas visible • Keeps text on top of photos readable • Handles modern websites built with CSS variables, Tailwind, Bootstrap and web components MAKE IT YOURS • Six themes: Midnight, Ocean, Dim, Warm, Graphite and true-black AMOLED • Build your own palette from any colors • Fine-tune brightness and contrast, and choose how images look • See every change instantly in a live preview that runs Safari’s own Dark Surf engine YOUR RULES • Switch any website between Dark, Invert and Off right from Safari • Keep lists of websites that are always dark, inverted or never themed • Follow a schedule or your device’s Dark Mode, or pause for an hour PRIVATE BY DESIGN Pages are recolored on your device. Dark Surf has no account, no analytics, no ads and no tracking, and never sends the pages you visit to anyone. Dark Surf is a Safari extension. After installing, turn it on in Settings › Apps › Safari › Extensions. The app shows you how.
ChangeDay
Read full descriptionHide full description
ChangeDay helps people with Type 1 Diabetes and their caregivers remember when insulin infusion sites, CGMs, and pump batteries were last changed, and when they are due next. Built for simple shared routines, ChangeDay keeps the focus on the three things you need to check quickly: your site, your sensor, and your pump battery. Log a change in one tap, see the next due day, and optionally share the same tracker with a caregiver or family member using Apple’s CloudKit Sharing. Whether you are tracking your own routine or helping someone else stay organized, ChangeDay is designed to be calm, private, and easy to use. Key features: • Track insulin infusion site changes • Track glucose sensor change days • Track insulin pump battery changes • See last changed and next due dates at a glance • Log site, sensor, or pump battery changes in one tap • View upcoming change days on a simple calendar • Review change history • Set local reminders for due dates • Share one tracker with another person using iCloud/CloudKit Sharing • Keep data stored locally and in your personal iCloud account • No account, ads, or subscription ChangeDay is intentionally simple. It is not a blood glucose tracker, dosing calculator, medication manager, or diabetes treatment app. It does not provide medical advice, dosing guidance, diagnosis, treatment recommendations, or emergency alerts. Always follow guidance from your clinician and the instructions from your device manufacturer.
Screenshots
Verdict
Dark Surf and ChangeDay are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
| Parameter | Dark Surf | ChangeDay |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 6 MB | 5 MB |
| Age rating | 17+ | 4+ |
| Developer | Vali Mikayilov | jonathan hering |
In-app purchases
Dark Surf
No in-app purchases
ChangeDay
No in-app purchases









