piotrkruk
Substacknewsletter · by piotrkruk · pl
Friday at 8:25 - Smart Ideas by Piotr Kruk
- Audience
- 2K subscribers
- Shown publicly on Substack
- Observed frequency
- Every two weeks
- From 5 posts indexed in the last 90 days
- Last post
- Oct 30, 2026
- 14 days ago
- Likely audience
- language learners
- Inferred from post content
piotrkruk is a Substack newsletter by piotrkruk covering personal productivity and motivation, foreign language learning methods and English vocabulary and C1 level. NewsletterFIT indexed 5 posts from it in the last 90 days, most recently on Oct 30, 2026. Shown publicly on Substack: 2K subscribers.
Topics
- personal productivity and motivation
- foreign language learning methods
- English vocabulary and C1 level
- premium newsletter subscription
- workplace behavior and employee retention
Recent posts
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Sponsors detected
No sponsored posts detected in the last 180 days of indexed posts.
Detected automatically from posts marked as sponsored. Detection can miss or misread placements.
See the full picture on piotrkruk
Subscriber momentum over time, every detected sponsor with the source post, companies and people it mentions, guests, and an alert when any of it changes.
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Compiled from public pages · refreshed Nov 5, 2026 · How NewsletterFIT collects and labels data