Instruments vs Pi Deliberate
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Instruments
Explore a vibrant collection of 55 musical instruments with interactive sound and visuals. Learn instrument names and sounds in 78 languages, perfect for young children and language learners. This offline app offers a safe, ad-free, and engaging musical discovery experience.
- 55 interactive musical instruments
- Real sounds and spoken names
- Supports 78 languages
- Offline functionality
- Adjustable slideshow mode
- Parental gate for settings
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Instruments is the best interactive sound picture book featuring 55 musical instruments: tap the image to hear the instrument and see its name in your chosen language (78 languages). Large images, real sounds, spoken names. Who is it for? Ages 1–5 for the picture-book experience. Ages 3–15 for language learning and instrument vocabulary. How it works The interface lets a child, alone or with an adult, discover each instrument and its sound. Images can advance automatically like a slideshow (adjustable speed) or manually by swiping the screen. The display order is configurable (random or sequential). A long-press on the instrument name lets you choose another display/spoken language. Multilingual (78 languages) Spoken names and interface available in your language of choice, to build vocabulary and train the ear from an early age. Tip: in your device settings, download Apple’s premium voices (higher-quality voices provided by iOS). Why you’ll love Instruments? Clear, reassuring musical discovery for young children. Natural pronunciations and authentic sounds. Multilingual (78) to support early learning, vocabulary, and listening. Works anywhere Works offline and in airplane mode: all images and sounds are stored on device No connection required. Orientation Portrait and landscape on iPhone and iPad. Parents and schools – Parental gate (settings protected by a random math question). – Schools reminder: 50% off via Apple School Manager. Privacy – No ads – No in-app purchases – No tracking – No data collection – No analytics – Privacy Nutrition Label: “No data collected” Contact us contact@iburgerapps.com Instruments accordion, acoustic guitar, bagpipes, balalaika, bandoneon, banjo, barrel organ, bass drum, bass guitar, bassoon, bugle, castanets, cello, clarinet, claves, congas, crash cymbal, didgeridoo, djembe, double bass, drum kit, duduk, electric guitar, flute, french horn, gong, grand piano, handbell, harmonica, harp, harpsichord, lute, mandolin, maracas, oboe, pan flute, piccolo, pipe organ, recorder, saxophone, sitar, snare drum, synthesizer, tambourine, tenor drum, timpani, triangle, trombone, trumpet, ukulele, upright piano, viola, violin, xylophone Supported languages (displayed and spoken) Afrikaans, Albanian, German, Amharic, English, Arabic, Armenian, Azerbaijani, Basque, Bengali, Belarusian, Burmese, Bosnian, Bulgarian, Catalan, Simplified Chinese, Traditional Chinese, Korean, Croatian, Danish, Spanish, Estonian, Filipino/Tagalog, Finnish, French, Galician, Welsh, Georgian, Greek, Gujarati, Hausa, Hebrew, Hindi, Hungarian, Indonesian, Irish, Icelandic, Italian, Japanese, Kannada, Kazakh, Khmer, Lao, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Maltese, Marathi, Dutch, Norwegian Bokmål, Norwegian Nynorsk, Uzbek, Persian/Farsi, Polish, Portuguese (Brazil), Portuguese (Portugal), Punjabi, Romanian, Russian, Serbian (Cyrillic), Serbian (Latin), Sinhala, Slovak, Slovenian, Swedish, Swahili, Tamil, Czech, Telugu, Thai, Turkish, Ukrainian, Urdu, Vietnamese, Yoruba, Zulu
Pi Deliberate
This app uses memorizing digits of pi to train expertise through deliberate practice. It provides a valid environment, repetitions, and timely feedback to foster recognition, memory, and intuition.
- Memorize digits of pi
- Deliberate practice training
- Timely feedback on accuracy
- Track progress based on mastery
- Learn using chunking method
- Develop recognition and memory
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How do real experts develop extraordinary ability? Research shows that expertise emerges when four conditions are met: a valid environment, many repetitions, timely feedback, and deliberate practice. Pi Deliberate is designed to satisfy all four conditions using one of the simplest and cleanest problems possible: memorizing the digits of pi (3.141592...). This is not about tricks or talent. It is about training recognition, memory, and intuition the way experts actually do. WHY PI? The digits of pi create an ideal training environment: - Infinite depth: there is always more to learn - Clear right or wrong: no ambiguity - Consistent structure: repeated exposure to the same patterns - No shortcuts: improvement reflects real learning Unlike many skills, pi provides a high-validity environment where your progress directly reflects how much you have learned. THE FOUR CONDITIONS OF EXPERTISE Valid Environment A stable, rule-based domain with real patterns to discover. Many Repetitions Focused, repeated attempts that build long-term memory. Timely Feedback Immediate correction after every digit you enter. Deliberate Practice Sessions designed to keep you just beyond your comfort zone, where real learning happens. HOW YOU PRACTICE - Learn digits using chunking rather than rote memorization - Receive instant feedback on accuracy - Track progress based on mastery, not streaks - Train intuition by recognizing patterns The goal is not just remembering more digits. It is understanding how expertise forms. WHO THIS IS FOR - Learners curious about how experts are made - Students, engineers, and scientists - People interested in cognitive science and deliberate practice - Anyone who values depth over gimmicks NOT A GAME No randomness. No shortcuts. No artificial rewards. Just a valid environment, repeated effort, timely feedback, and deliberate practice. Inspired by research on expertise development and the Veritasium video "The 4 things it takes to be an expert" by Derek Muller. Train how experts are made. One digit at a time.
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Verdict
The clearest difference is price: Pi Deliberate at Free against Instruments's $1.99. Pi Deliberate also leads on iOS requirement (15.1 vs 17.6). On rating, ratings volume, ads and in-app purchases 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
Pi Deliberate is free to download; Instruments costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Instruments against 5.0 for Pi Deliberate. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
| Parameter | Instruments | Pi Deliberate |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 6 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 24 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Christophe Burdin | Byeongsoo Kim |
Customer experience
Instruments
Pi Deliberate
In-app purchases
Instruments
No in-app purchases
Pi Deliberate
No in-app purchases









