This app was mentioned in 3 comments, with an average of 1.67 upvotes
There's even a Silent Hunter clone on Android, the graphics leave a bit to be desired but the depth and realism is spot on:
https://play.google.com/store/apps/details?id=com.PanicEnsuesSoftware.CrashDive&hl=en
Info for Crash Dive: Price (USD): $1.99 was $3.99 | Rating: 4.2/5 | Installs: 10,000+ | Size: 91M | IAPs/Ads: No/No
Info for Crash Dive 2: The Silent Service: Price (USD): $5.49 was $9.99 | Rating: 4.3/5 | Installs: 1,000+ | Size: 139M | IAPs/Ads: No/No
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