#iOS限免
《今日份内购限免App》
款蛇类识别器：
https://apps.apple.com/cn/app/snake-identifier-snakology/id6748157936
鸟类叫声识别器：Featha
https://apps.apple.com/cn/app/bird-call-identifier-featha/id6739812860
PS：付款时确认无价格显示即可