Solar Sphere vs DatePlus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solar Sphere
Monitor real-time solar activity with Kp-index data and high-resolution solar images. Understand geomagnetic disturbances and their impact on Earth's magnetic field. Ideal for drone pilots needing to check conditions before flying.
- Real-time Kp-index monitoring
- High-resolution solar images
- Kp-index explanation
- Geomagnetic storm indication
- Drone flying safety guidance
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The Solar Sphere provides current value of Kp-index derived from the NOAA Space Weather Prediction Center using data from multiple ground-based magnetometers. Also, current solar images are available in 4 different high resolution formats. The Kp-index quantifies solar disturbances in the horizontal component of earth's magnetic field with an integer in the range 0-9 with 1 being calm and 5 or more indicating a geomagnetic storm. For drone flyers, please only fly on solar KP Index less than 5.
DatePlus
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With DatePlus, you can easily check the date after the specified number of days. There is also a function to calculate from today, which takes into account the current day, and a pin function that allows you to save the number of days you have checked once. To check the number of days pinned, swipe left after launching the app. 【How to register the number of days on the dial】 1. Pin the number of days you want to see on your watch face. 2. On the pinned screen, swipe right on the number of days you want to view. 3. Tap the orange dial registration button. 4. Select the widget number to be set
Screenshots
Verdict
The clearest difference is update cadence: DatePlus at every 9 days against Solar Sphere's every 9 months. Solar Sphere's advantage is iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Solar Sphere ships an update every 9 months, DatePlus every 9 days. The most recent releases landed on June 1, 2026 and September 17, 2026 respectively.
| Parameter | Solar Sphere | DatePlus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (6 ratings) — better | — |
| Positive reviews | 44.4% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 9 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPod, Apple Watch |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 3 MB | 3 MB |
| Age rating | 17+ | 4+ |
| Developer | Pulsely Consulting Limited | Shunsuke Nakagawa |
In-app purchases
Solar Sphere
No in-app purchases
DatePlus
No in-app purchases
