P vs Shima Bird
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
P
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P-REx Zero Console: Parameterized Runtime Execution (Z3R0 Edition) I just wanted to run one function. RStudio didn’t open. My Wi-Fi disappeared. Cookies were required — tragically, not the snacking kind. So I made this. This is P-REx Zero, a lightweight demo version of the full P-REx app. It’s a stripped-down R console for your iPhone. No cloud. No account. No add-ins. Just R, running offline, like it’s 2004 and deep focus was still fashionable. Whether you’re simulating data from the couch, calculating probabilities at 35,000 feet, or panic-testing t.test() before a meeting, P-REx Zero shows up quietly and does the math. Like a stats TA who won’t judge your p-value or your life choices. What this version does: • Runs a focused set of core R functions • Good for testing, learning, and basic stats • Offline, because life happens • Remembers your variables, even if you don’t • No ads, no feeds, no “smart” tooltips Want more? The full version of P-REx unlocks 99+ functions, extended syntax support, and extra features. But this gets you started. The paid version of P-REx Console can be found here: https://apps.apple.com/ca/app/p-rex-console/id6743998835 I built it to run one line of code. Now I use it to avoid everything else.
Shima Bird
Master Japanese kanji, vocabulary, and grammar with smart flashcards and AI-powered tools. This app uses an advanced spaced repetition algorithm to optimize learning and retention. It offers comprehensive JLPT coverage, graded reading, audio conversations, and personalized study experiences.
- Spaced repetition algorithm (FSRS)
- Thousands of flashcards (Kanji, vocab)
- 200+ grammar lessons
- Graded reading and audio conversations
- AI Tutor for explanations and practice
- OCR scan for vocabulary extraction
- Offline study mode
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Shima Bird — Learn Japanese with Smart Flashcards Master Japanese kanji, vocabulary, and grammar from JLPT N5 to N1 with Shima Bird — powered by FSRS, the most advanced spaced repetition algorithm. It learns how your memory works and schedules every review at the perfect moment, so you remember more in less time. Packed with content — thousands of flashcards, 200+ grammar lessons, graded reading, and audio conversations across every JLPT level. COMPLETE JLPT COVERAGE (N5–N1) • Thousands of vocabulary, kanji, and radical flashcards • 200+ grammar lessons with example sentences for every level • Kanji with readings, radical breakdown, and mnemonics • Graded reading passages — including illustrated Picture Book mode • Audio conversations with native-style voices • Daily quizzes and drill exercises (conjugation, particles, sentence building) SMART REVIEW (FSRS) Reviews scheduled at the optimal moment for long-term memory — no more cramming, no more forgetting. AI-POWERED TOOLS • AI Tutor — chat for explanations and practice • Auto-fill flashcards in one tap • Smart translation + deep sentence breakdown • OCR scan to extract vocabulary from images • YouTube transcript learning (Premium) VIVID MNEMONICS Memory tricks and kanji breakdowns for every character — remember faster, forget less. STREAKS & GAMIFICATION Daily quests, achievements, streak rewards, and a 30-day Starter Pass keep you coming back. MAKE IT YOURS Personalize with card skins, frames, headers, and adorable avatars. Light and dark mode included. OFFLINE STUDY Core flashcard study works fully offline — learn anywhere, anytime. Available in English and Thai. FREE DAILY TOKENS Get free tokens every day to unlock AI features. GOLDEN BIRD PREMIUM Unlimited new cards, full AI access, exclusive cosmetics, and more. Whether you're prepping for JLPT, learning your first kanji, or rebuilding your Japanese — Shima Bird is the cute, smart study buddy that makes Japanese stick. Start your journey today with Shiina Terms of Use: https://sites.google.com/view/shimabirb/terms-of-use Privacy Policy: https://sites.google.com/view/shimabirb/privacy-policy
Screenshots
Verdict
The clearest difference is in-app purchases: P at none against Shima Bird's 5. Shima Bird's advantage is update cadence (every 10 days vs monthly). On price, ads, device support and iOS requirement 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. Shima Bird sells 5 in-app purchases, starting at $7.99 per month. P asks for nothing beyond the download.
P ships an update monthly, Shima Bird every 10 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.
| Parameter | P | Shima Bird |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.9 (16 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 16 — better |
| Update frequency | Monthly | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.1 — better | 15.5 |
| Further details — not scored | ||
| Size | 29 MB | 520 MB |
| Age rating | 4+ | 4+ |
| Developer | Ashish Srikanth | Nuttapong Ketam |
In-app purchases
P
No in-app purchases
Shima Bird
- Golden Bird Monthly$7.991 Month
- Golden Bird Yearly$59.991 Year
- 100 Tokens$0.99
- 500 Tokens$3.99
- 1500 Tokens$8.99









