UPDATE 6/12/2023: the crashes have been fixed as of the 2.14 release from June 1, 2023. Thanks for your patience!
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I’ve been made aware of some crashes reported by a few users. Actively looking into the issue. Apologies for the frustrations caused by it
Daylight Savings issue
Today by accident I discovered that Daylight Savings knocked out one hour from the Start/End time picker controls in Sola, with crippling effects on usability. This only happens once a year in the spring when we lose one hour to Daylight Savings. Will deploy the fix soon. In the meantime, apologies to all users who experienced the issue.
Stability issues with Apple Weather
There were some crashes reported caused by Apple Weather API calls, had to roll back this functionality until the root cause is identified and resolved. Latest release is version 2.10
UPDATE 2023-03-09: a fix has been deployed
New version 2.9 of Sola released
Just released a new version of Sola featuring a more robust source of UV index forecast data provided by Weather.
How Sola can help prevent skin cancer
Sola got another review in Apps to Detect Skin Cancer Melanoma Early by App Pearl. While Sola is not designed to detect skin cancer, it will definitely help you minimize the risk of UV over-exposure, which is one of the main causes of melanoma.
Sola featured in Best Health Apps
Sola got a review by the wonderful team at Free Apps for Me, a professional app review site. You can read the article here: Best Health Apps.
Vitamin D Tracking
Added a new feature to the app that tracks vitamin D production. If you haven’t downloaded the app, give it a try – first week FREE!
Affected users who purchased version 1.25
Update 3/2/2021: this has been fixed. Users should be able to restore their purchases now.
Users who purchased version 1.25 are presented with a paywall screen and cannot restore their purchases. I have just released a fix and Apple should be approving it within the next few hours. Once the release is approved, affected users will be able to restore their previous purchase. Apologies for the inconvenience!
Zinc based sunscreen ranked
This article at Elle attempts to rank zinc oxide based sunscreens: We Tried Over 30 Zinc Sunscreens—These Are The Best Ones
How does tan develop (from Wikipedia)
There are two different mechanisms involved in production of a tan by UV exposure.
Firstly, UVA radiation creates oxidative stress, which in turn oxidizes existing melanin and leads to rapid darkening of the melanin. UVA may also cause melanin to be redistributed (released from melanocytes where it is already stored), but its total quantity is unchanged. Skin darkening from UVA exposure does not lead to significantly increased production of melanin or protection against sunburn.
In the second process, triggered primarily by UVB, there is an increase in production of melanin (melanogenesis), which is the body’s reaction to direct DNA photodamage from UV radiation. Melanogenesis leads to delayed tanning, and typically becomes visible two or three days after exposure.
The tan that is created by increased melanogenesis typically lasts for a few weeks or months, much longer than the tan that is caused by oxidation of existing melanin, and is also actually protective against UV skin damage and sunburn, rather than simply cosmetic. Typically, it can provide a modest Sun Protection Factor (SPF) of 3, meaning that tanned skin would tolerate up to 3 times the UV exposure as pale skin. However, in order to cause true melanogenesis-tanning by means of UV exposure, some direct DNA photodamage must first be produced, and this requires UVB exposure (as present in natural sunlight, or sunlamps that produce UVB).
Source: https://en.wikipedia.org/wiki/Sun_tanning#Tanning_process