title: PWA on IOS and offline storage
body: <p>We looking to develop an "App" which would have the ability to record the details of a damaged car for assessors. The idea is that a small number of assessors would have company iPads. Then when car is damaged and returned to the car yard they can visit take photos, enter some details and then upload them into the main system later. Some of the car yards may be in areas that do not have internet coverage, so offline capability is required.</p>
  
  <p>Our initial thoughts were to develop an IOS App for installation on a small number of company iPads. The App could access the camera to take photos and then when the device has internet access upload the photos to the main system. However this solution could prove too costly (regarding development costs) for the customer.</p>
  
  <p>I have read about PWAs and caching data, but the caching seems to be for offline read access. </p>
  
  <p>If we installed chrome on an iPad and then installed a PWA then presumably</p>
  
  <ol>
  <li>The PWA could store pictures up to 128GB * 6% = 7.68GB? </li>
  <li>If stored using the File System API then (as long as there is plenty
  of space on the system) the data will be persisted (my understanding is there is no time limit)? Or would a different type of storage be more suitable.</li>
  <li>The offline data is obviously important (may be required in court) so are there any other concerns around persistence &amp; stability before the images are uploaded to the main system? </li>
  </ol>
  
  <p>Note we would prefer to use iPads (as the customer would prefer these) but we could consider other platforms. </p>
  
  <p>At this stage I am really trying to find out if a PWA accessing the offline storage is likely to be feasible, practical and stable on the platform?</p>