Claim you can't send PDFs. Sounds like you have to solve the PDF email issue first.
https://www.google.com/search?q=fillable+pdf+forms&ie=utf-8&oe=utf-8#q=fillable+pdf+forms+on+android shows android does it and if you change the search you see Apple works too.
There are alternatives to Adobe's app so I see no need to share a google on that.
You may want to farm this out with a full specification. Filling a PDF has been kicked around since about 2010 ( https://www.androidpit.com/forum/406511/anyway-to-use-android-to-fill-in-a-pdf-form ) so it's a sure thing it can be done.
But maybe this isn't enough. You may be in search of an app specific to your needs.
Note: Corrected title.
I am employed at an HVAC company and we need to create our own fillable pdf forms, which can then be sent to our techs out in the field, so that they can input all the data from their maintenances(unit pressures, temperatures, belts checked, etc). They do 5-6 jobs a day and there are 6 techs, so they would use it often. They have either iphones or android smartphones, and I'm curious if they will be able to fill out the fillable pdf forms via their phones? What are the cheapest pdf form designers, that are still versatile? (I've looked at Adobe Pro and don't want to spend $450 on it, but it seems like it would work)
Next question, how can they send the office the saved form? Would it have to be emailed, or can they take a screenshot or convert it to a picture, so that they can attach it to the current app we use(our dispatching app lets them see all the customer info and history, but they can only attach pictures from their phone gallery, or take a new picture....they can't attach pdfs. DUMB!)
We might have to send customers the completed forms, so they need to look nice, and I think taking a screenshot will look unprofessional.
Please help with pdf designer suggestions and any other options about how to send the office specs on each job, that looks professional enough to send to a customer.
Thanks in advance!