Tuffy vs KnowDay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tuffy
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Tuffy helps you learn languages with clarity and confidence. Through detailed alignment between source and target sentences, the app guides you toward a more precise understanding of vocabulary and grammar patterns.
KnowDay
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Knowday turns curiosity into a daily habit. Pick a topic, discover a surprising fact, answer a quick question, and see instantly if you’re right. Build streaks, unlock titles, and save your favorite facts. No long reads. No boring lessons. Just one fun moment of discovery every day.
Screenshots
Verdict
The clearest difference is update cadence: Tuffy at fortnightly against KnowDay's every 5 weeks. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Tuffy ships an update fortnightly, KnowDay every 5 weeks. The most recent releases landed on September 19, 2026 and September 14, 2026 respectively.
| Parameter | Tuffy | KnowDay |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 12 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Anindyka Sekar Trisnasih | Daniel Brouwer |
In-app purchases
Tuffy
No in-app purchases
KnowDay
No in-app purchases
