SentenceDeck vs Study Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SentenceDeck
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Practice the conversations you will actually have. Pick a scene — airport check-in, ordering coffee, a job interview — and SentenceDeck uses AI to write a short dialogue for your level. You say your lines; your partner's lines are played for you. It is shadowing, made real: hear each line, say it, then hear yourself back. No grades, no corrections, no leaderboards — just a calm, repeatable way to rehearse real situations out loud, in a hand-drawn sketchbook. HOW A SCENE WORKS 1. Choose from 30 everyday scenes in five categories: Travel, Daily Life, Work, Social and Emergencies 2. Pick your level (A2, B1 or B2) and a voice for each side of the dialogue 3. Practice line by line: listen to the reference, speak — recording stops when you stop speaking — then play yourself back. Play your own lines, swap to the other role, or practice both sides 4. Finish with a short recap: lines practiced, time spent and the lines you recorded again Line-by-line translations in your interface language are one tap away. A/B compare, sentence lock and playback speed (0.75× to 1.5×) are all there while you practice. A STAMP FOR EVERY SCENE Finish a scene and it is stamped into your passport, next to today's lines, your day streak and your total. My Scenes keeps every dialogue you have practiced, with all its versions, ready to search and practice again. DESCRIBE YOUR OWN SCENE Type a situation in one sentence — "Calling my landlord because the water heater is broken" — and get a dialogue written for it. Your description is sent to an AI service to write the dialogue, and the app asks for your permission before the first time. Everyday situations only; please leave out names and contact details. Any AI-written dialogue can be reported from the practice screen or the recap. READY OFFLINE 21 built-in English scenes (B1) come with audio, are free to practice and work without a connection, so you can start talking the moment you open the app. TWO WAYS TO WRITE A DIALOGUE • Standard: free, with a number of free dialogues every day • Detailed: richer context and more natural lines. Uses characters from your balance; the cost is shown before you start, and nothing is charged if writing fails TWO KINDS OF VOICE System voice: built into iOS. Free, offline, unlimited. Premium voice: natural, lifelike voices that speak each line with the mood of the scene. Premium audio is generated sentence by sentence as you practice and paid for in characters. The same sentence is cached for replay with the same voice settings; changing the voice may generate it again and use characters again. READ ALONG WITH YOUR OWN TEXT Paste an article, a script or presentation notes — or import a text file — and practice it sentence by sentence. Backup & Restore keeps the audio you generated. LANGUAGES Practice English, Chinese (Simplified and Traditional), Japanese, Korean, Spanish, French, Italian or German. The app itself speaks 10 interface languages, on iPhone and iPad, in light or dark mode. CHARACTER PACKS • 6,000 characters • 30,000 characters • 72,000 characters Characters never expire and are used for premium voice and Detailed dialogues. The App Store shows the local price for your region. Whether you are getting ready for a trip, a job interview, IELTS or TOEFL, or simply want to sound natural in everyday conversations, SentenceDeck gives you a focused speaking routine for the situations that matter to you. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.kuroneko-cmd.dev/privacy/sentencedeck/
Study Timer
This app provides a unique study companion experience with an animated cat that studies and rests alongside you. It features a Pomodoro timer, customizable sessions, and ambient lofi music to create a focused and cozy study environment. It's designed to enhance concentration without gamification or pressure.
- Animated cat study companion
- Pomodoro timer with customizable durations
- Automatic break timer
- Ambient lofi music and sound effects
- Session notes and streak tracking
- Works offline and with phone locked
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Meet Momo - a calico cat with round glasses and a pink sweater who sits at her desk and studies with you. She writes when you work. She sleeps when you rest. She's not a reward. She's a companion. Press Start and watch Momo come alive - writing in her notebook by candlelight while lofi music and vinyl crackle fill the room. When your pomodoro break starts, she drifts off to sleep. When you come back, she's ready. POMODORO TIMER BUILT FOR STUDENTS - Classic 25-minute pomodoro sessions or set your own duration - Automatic break timer with customizable break length - Pomodoro mode auto-cycles focus and break sessions - Save presets for your favorite study routines BUILT FOR HOW YOU STUDY - Plays alongside Spotify and Apple Music - never interrupts your playlist - Works with your phone locked - timer keeps running in background - Session notes to log what you studied - Streak tracking to build daily focus habits A STUDY COMPANION, NOT A CLOCK - AI-generated character animation - not a sprite, not a sticker - Three-layer spatial audio with vinyl backing, ambient SFX, and lofi music - Dark Academia aesthetic - warm, cozy, cinematic - Handwritten typography throughout MOMO PREMIUM - Remove all ads forever - We don't like subscriptions either - pay once for $9.99 - Or $3.99/week with a 3-day free trial - Support an indie developer and keep Momo's lamp burning HOW IT WORKS 1. Pick your focus duration or use the 25-minute pomodoro default 2. Press Start - Momo begins studying with you 3. When time's up, Momo falls asleep during your break 4. Log your session, build your streak, repeat WHY STUDENTS LOVE MOMO - Cozy lofi anime aesthetic designed for late-night study sessions - No account required - everything stays on your device - Lightweight - no bloated 200MB productivity apps here - Works offline - no internet needed - Momo studies with you - consistent effort earns her company PERFECT FOR Exam prep • Essay writing • Homework sessions • Reading Revision • Deep work • Coding • Creative projects • ADHD focus Momo doesn't gamify your focus. She doesn't guilt you into studying. She just sits there, working alongside you, making your phone feel like a warm corner of a quiet library. Download free. Subscriptions auto-renew unless canceled at least 24 hours before the current period ends. Manage in Apple ID settings. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: SentenceDeck at none against Study Timer's shown. On price, update cadence, 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. SentenceDeck sells 3 one-off in-app purchases and Study Timer sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.
SentenceDeck ships an update every 6 weeks, Study Timer monthly. Both last shipped on October 15, 2026.
| Parameter | SentenceDeck | Study Timer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 weeks | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 36 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | 奇濂 任 | Cloud Motion Lab LLC |
In-app purchases
SentenceDeck
- Credits 100$0.99
- Credits 500$3.99
- Credits 1200$7.99
Study Timer
- Momo Weekly3 Days trial$4.997 Days
- Momo Lifetime$9.99









