Swift programming book and exercise platform
Teaches people the Swift language with a self-written book and an online coding exercise platform. Money comes from selling these products.
At a glance
Estimated by a classifier that read the source. The bar shows how sure it was.
- Category
- Digital productsLow confidence49% surex
- Earns from
- One-time sales81% surex
- Startup cost (estimate)
- $1k to $10kLow confidence52% surex
- Time it takes (estimate)
- Hands-off84% surex
- Where
- Online98% surex
- Coding
- Needs coding94% surex
Source
Hacker NewsComment by andrei512 in “Ask HN: What are your passive income sources?”, October 26, 2016
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