PrestaShop app builders on this list are sold either as a module with a one-time license or as a monthly or quoted service.
Check what a one-time license covers. Knowband includes 3 months of support and a year of updates, Binshops includes 3 months of access to its build system, and FME Modules includes lifetime updates and support. Publishing can cost extra, such as Binshops' $160 publish-for-you option.
Decide who builds and publishes the app. Webkul (Mobikul), Knowband and Binshops are self-serve modules, while FME Modules compiles the iOS and Android files for you. MobiLoud, Reskyt and JMango360 design, build and submit the app as a managed service.
Check how the app connects to your store. FME Modules syncs through PrestaShop's web service API, and Binshops uses its own open-source REST API module instead. MobiLoud builds the app on your live site, so your theme and modules carry over.
Ask whether you get the source code. Webkul sells source code as an optional add-on, Binshops ships source files on a higher tier so the app can run on your own servers, and Knowband does not provide source code.