DuotingZ vs Flipside
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DuotingZ
This app allows users to repeatedly play audio files from their iPod library, including albums, audiobooks, and podcasts. It features adjustable playback speeds, sound wave visualization, and speech recognition in 58 languages. The app also supports background playback and remote control functionality.
- iPod library integration
- Adjustable playback speed
- Repeat playback options
- Speech recognition (58 languages)
- Sound wave visualization
- Background playback
- Remote control
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***Functions*** iPod library -album -audiobook -podcast Play repeatedly -the any ranges of a file -the whole file -1, 2, 4, 8, 16 times or unlimited Sound wave -within 30 minutes Speech recognizer -58 languages -within 30 seconds Remote Control -play -forward -back Play speed -x 0.5 -x 0.67 -x 0.8 -x 1.0 -x 1.25 -x 1.5 -x 2.0 Play in background
Flipside
Learn Korean with interactive flashcards, a guided Hangul course, and a comprehensive dictionary. Features spaced repetition, K-drama themed decks, and offline access. Buy once, own forever.
- Guided Hangul course
- Built-in Korean and English dictionaries
- Spaced repetition system
- Curated K-drama starter packs
- Offline access
- Quiz mode with Tinder-style gestures
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Flipside is a beautiful app for learning Korean from the K-dramas you love. Watch real scenes and catch each word the moment it's spoken, learn to read and write Hangul from zero, and lock in vocabulary with spaced repetition, a built-in dictionary and curated K-drama starter packs. Buy once, own it forever. $7.99 on iPhone, or free forever on the web at getflipside.app. PRICING THAT RESPECTS YOU $7.99 one-time on iPhone. No subscriptions. No ads. Ever. Try Flipside free on the web at getflipside.app — buy the iPhone version only when you're sure. KEY FEATURES • K-Drama Clips — Watch hand-picked K-drama scenes and catch each word as it's spoken: it lights up on screen at the exact moment you hear it. Tap a word for its meaning, filter by level, and save the words to a deck or quiz yourself on them. Clips play in YouTube's own player, and watching is always free. • Read Hangul From Zero — A guided beginner course takes you from your very first letter to reading real K-drama words in about an hour. Native audio for every letter, syllable-block practice, no romanization crutch. Finish to earn a badge and a ready-made review deck. • Write Hangul — Watch each letter write itself, then trace it with your finger, stroke by stroke. Stroke order and direction are checked; a shaky hand isn't. Hints instead of fail screens. Practice all 40 letters and earn the Hangul Writer badge. • 4 Starter Packs — Top 75 K-Drama Phrases, 69 Travel Korean, 52 Daily Conversation, 50 K-Drama Food & Dining. Tap Browse, hit add, start studying. • Built-in Korean Dictionary — Browse 54,800+ words by TOPIK level, sourced directly from 국립국어원 (KRDict), the National Institute of Korean Language. Search, browse by topic, add to a deck with one tap. • Built-in English Dictionary — 9,700+ learner definitions for A1–C2 words, written for clarity by Sean & Owen, our AI lexicographers. • Spaced Repetition — Smart scheduling powered by the SM-2 algorithm. Flipside shows you the right cards at the right time, so you remember more with less effort. • Quiz Mode — Flip-and-grade study sessions with state filters. Quiz any TOPIK level or dictionary topic on the fly, no deck required. Tinder-style swipe gestures. • Pair Up — Tap a Korean word, tap its meaning, and watch the pair clear off the board. Every match plays the word out loud, so each pair doubles as a pronunciation rep. No timers, no fail states, no streak to protect. • Audio Pronunciation — Native Korean audio for every dictionary word. Two natural English voices (Claire and Oliver) for the English dictionary — pick your favorite in Settings. • Beautiful Badges — Earn milestones for studying, mastering decks, exploring the dictionary, and more. Share milestone cards to your stories. • Photo Cards — Snap a photo of a textbook page, sign, or scene. Crop to the word. Memory anchors that make words stick. • Offline First — Your cards are always available, even without internet. Changes sync automatically when you're back online. • Beautiful Design — Calm, minimal interface with light and dark themes. No clutter, no distractions. NO ADS, NO SUBSCRIPTIONS, NO NAGS Flipside believes in ethical, transparent pricing. We don't run ads. We don't sell your data. We don't trickle features behind subscription paywalls. You pay $7.99 once, and Flipside is yours forever — even when we add more languages, more decks, more features. The web app at getflipside.app is completely free, forever — flashcards, the dictionary, spaced repetition and the Read Hangul course. Use it on your laptop, share with friends, and only buy the iPhone app when you're sure. Made with care. Sustainable economics. Yours for life.
Screenshots
Verdict
The clearest difference is rating: Flipside at 5.0 against DuotingZ's 4.0. Flipside also leads on ratings volume (6 vs 1). DuotingZ's advantage is in-app purchases (none vs 1) and update cadence (weekly vs fortnightly). On price, review sentiment and ads 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. Flipside sells 1 one-off in-app purchase. DuotingZ asks for nothing beyond the download.
Flipside holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Flipside has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
DuotingZ ships an update weekly, Flipside fortnightly. The most recent releases landed on October 7, 2026 and October 18, 2026 respectively.
| Parameter | DuotingZ | Flipside |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 6 — better |
| Update frequency | Weekly — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 10.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 33 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | OMTea App | HoneyReserve LLC |
Customer experience
DuotingZ
Flipside
In-app purchases
DuotingZ
No in-app purchases
Flipside
- Flipside — Lifetime Unlock$7.99









