SGD Laser vs ChangeDay
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SGD Laser
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This application is designed specifically for SCULFUNG's galvanometer laser engraving machine, allowing individuals or small business users to control the machine without the need for a computer. It simplifies the carving process, especially Suitable for outdoor use. Enable SCULFUN engraving machine equipment to print images, engrave, etc. on general non-metallic surfaces through APP operation
ChangeDay
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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 Appleβs 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: β’ Track insulin infusion site changes β’ Track glucose sensor change days β’ Track insulin pump battery changes β’ See last changed and next due dates at a glance β’ Log site, sensor, or pump battery changes in one tap β’ View upcoming change days on a simple calendar β’ Review change history β’ Set local reminders for due dates β’ Share one tracker with another person using iCloud/CloudKit Sharing β’ Keep data stored locally and in your personal iCloud account β’ 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
The clearest difference is device support: SGD Laser at 4 against ChangeDay's 1. SGD Laser also leads on iOS requirement (14.0 vs 17.6). On price, ads and in-app purchases 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.
| Parameter | SGD Laser | ChangeDay |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months | β |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod, Mac β better | iPhone |
| Requires iOS | 14.0 β better | 17.6 |
| Further details β not scored | ||
| Size | 108 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Sculpfun Technology Co., Ltd. | jonathan hering |
In-app purchases
SGD Laser
No in-app purchases
ChangeDay
No in-app purchases









