We agree with Square - write twice, but aim to align the code that implements “business logic.” But what does this mean in practice, and can you copy Swift code into Android Studio, or Kotlin into Xcode, twiddle your let ↔️ val, and use that as a template? We have witnessed every stage of the evolution of mobile development on iOS and Android, though as a small software company, we have had to be thoughtful about how we invest coding time and resources. We’re focusing these reviews on business logic and view models.Īt Perry Street Software, we have been writing mobile apps since 2009 and publish two of the oldest apps on the iOS App Store - LGBTQ+ dating apps SCRUFF and Jack’d. …we’re asking Android engineers to review iOS pull requests and vice-versa. Other companies like Square acknowledged that “we still build everything twice”, but that mobile development has converged such that: …mobile developers simply did not want to work on a C++ project…the associated overhead made the cost of this approach outweigh the benefits.

Dropbox attempted to build a cross-platform C++ mobile library, but concluded that:

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