Please stop labeling your apps as “Available on Apple Store and Google Play”. Your apps should work on all platforms. Please spend some time to brush up your skills and move up to the next level, which is “develop once, run everywhere”.
You don’t have excuses anymore. All you need is HTML5/CSS3/JS, as you know. Besides, there are several mobile development platforms to make development easier for you. Give it a try. I know you are very busy with your full-time job and family. You may need to sacrifice your evenings and weekends for the learning curve, but believe me, it is worth it.