AppCorpus MCP gives your agent current app data, prices, screens, features and sources.
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GET /api/v3/apps/6744618279
{
"app_id": 6744618279,
"canonical_url": "https://appcorpus.com/apps/pitch-diagram-vocal-tuner-6744618279",
"identity": {
"name": "Pitch Diagram: Vocal Tuner",
"slug": "pitch-diagram-vocal-tuner",
"developer": {
"name": "Daniele Roncaglioni",
"url": "https://appcorpus.com/developers/daniele-roncaglioni-developer_986b2a310c7bf445c10ae765b095841f"
},
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"stores": [
"apple"
],
"platforms": [
"iphone",
"ipad"
],
"status": {
"state": "active",
"label": "Active",
"last_checked": "2026-08-07",
"last_checked_label": "7 Aug 2026",
"banner": null,
"region_note": null
}
},
"listings": [
{
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"status": "ACTIVE",
"url": "https://apps.apple.com/us/app/pitch-diagram-vocal-tuner/id6744618279?uo=4",
"rating": 3.7,
"rating_count": 3,
"formatted_price": "Free",
"is_free": true,
"has_iap": true,
"has_subscription": false,
"version": "1.8.0",
"updated": "2026-05-15",
"currency": "USD"
}
],
"summary": {
"one_liner": null,
"summary": null,
"best_for": [],
"not_for": [],
"status": "fallback",
"at_a_glance": [
"Free to download",
"In-app purchases"
]
},
"categories": {
"official": [
"Music"
],
"appcorpus": [
{
"category_id": "music",
"label": "Music",
"url": "https://appcorpus.com/categories/music"
}
]
},
"use_cases": [],
"features": [
{
"capability_id": "free_app",
"label": "Free app",
"availability": "yes",
"access_level": "free",
"scope": null,
"evidence": "Store published"
},
{
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"label": "In-app purchases",
"availability": "yes",
"access_level": "free_limited",
"scope": null,
"evidence": "Store published"
}
],
"pricing": [
{
"store": "apple",
"formatted_price": "Free",
"is_free": true,
"has_iap": true,
"has_subscription": false,
"currency": "USD",
"market": "us",
"last_verified": "2026-08-07",
"rows": [
"Unlimited Usage — $1.99"
]
}
],
"screens": [
{
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},
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},
{
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},
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"alt": "Pitch Diagram: Vocal Tuner ipad screenshot 4"
},
{
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},
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},
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},
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},
{
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},
{
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},
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},
{
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},
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},
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"alt": "Pitch Diagram: Vocal Tuner iphone screenshot 19"
},
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},
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"alt": "Pitch Diagram: Vocal Tuner iphone screenshot 23"
},
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"store": "apple",
"platform": "iphone",
"alt": "Pitch Diagram: Vocal Tuner iphone screenshot 24"
},
{
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"store": "apple",
"platform": "iphone",
"alt": "Pitch Diagram: Vocal Tuner iphone screenshot 25"
},
{
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"store": "apple",
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"alt": "Pitch Diagram: Vocal Tuner iphone screenshot 26"
},
{
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},
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}
],
"ratings": [
{
"store": "apple",
"average": 3.7,
"count": 3,
"market": "us",
"observed_at": "2026-08-07",
"reviews": []
}
],
"privacy": [
{
"store": "apple",
"declarations": [
{
"title": "Data Not Collected",
"detail": "",
"source": "Developer declared"
}
],
"accessibility": []
}
],
"changes": [
{
"store": "apple",
"version": "1.0.1",
"released_at": null,
"notes": ""
},
{
"store": "apple",
"version": "1.0.2",
"released_at": null,
"notes": "- Smooth transitions between notes B to C - Removed overlap of the diagram with the status bar"
},
{
"store": "apple",
"version": "1.0.3",
"released_at": null,
"notes": "- Bug fixes - Can now restart free trial timer by closing the checkout screen"
},
{
"store": "apple",
"version": "1.1.0",
"released_at": null,
"notes": "- Added Tuner mode displaying the closest note, frequency and cent distance"
},
{
"store": "apple",
"version": "1.1.1",
"released_at": null,
"notes": "- Improved note detection stability - Improved Tuner UI"
},
{
"store": "apple",
"version": "1.2.0",
"released_at": null,
"notes": "- Note accuracy diagram showing notes relative to the closest note."
},
{
"store": "apple",
"version": "1.3.0",
"released_at": null,
"notes": "- Users can now set note transposition and sampling resolution in Preferences"
},
{
"store": "apple",
"version": "1.4.0",
"released_at": null,
"notes": "- Polyphonic Pitch Diagram Tool - Feedback button in settings"
},
{
"store": "apple",
"version": "1.5.0",
"released_at": null,
"notes": "- Added Spectrum and Tone Generator tools - Added Waveform strip to Mono and Poly tools - Increased Pitch Density (poly) sensitivity"
},
{
"store": "apple",
"version": "1.6.0",
"released_at": null,
"notes": "Scrollable Piano Roll — The pitch diagram now scrolls vertically through the full note range. Auto-follows your pitch, with pinch-to-zoom between 1–3 octaves. Piano Keys Skin — Switch between grid lines and a piano keys background. Record & Replay — Record your pitch sessions, then scroll through the captured trace to review every note. Save recordings and revisit them anytime. Renamed Tools — \"Pitch Density (Poly)\" → Pitch Spectrogram (Poly). \"Note Accuracy Diagram\" → Intonation Tracker."
},
{
"store": "apple",
"version": "1.7.0",
"released_at": null,
"notes": "- Added audio playback to monophonic Pitch Diagram recordings. - Added MIDI export for recordings. - Added support for non-standard tuning. - Added Solfege note labels. - Added full-range mode to the polyphonic Pitch Spectrogram. - Added a per-screen settings page."
},
{
"store": "apple",
"version": "1.8.0",
"released_at": "2026-05-15",
"notes": "- Keyboard: Playable piano-style keyboard with sampled instruments, visual feedback, a compact transport bar, and quick octave selection. - Interval Trainer: Practice hearing intervals in key over chord progressions, with stepped levels that get harder as you improve. - Solfege Trainer: Same kind of flow, but you sing the target scale degree while a live pitch diagram follows you."
}
],
"alternatives": [
{
"app_id": 6751228637,
"name": "PitchMonitor - Vocal Visual",
"url": "https://appcorpus.com/apps/pitchmonitor-vocal-visual-6751228637",
"reason": "Same category + similar ratings"
},
{
"app_id": 6758098531,
"name": "Vocal Pitch Monitor Track Note",
"url": "https://appcorpus.com/apps/vocal-pitch-monitor-track-note-6758098531",
"reason": "Same category + similar ratings"
},
{
"app_id": 6478816955,
"name": "AudioPitch: Pitch Monitor",
"url": "https://appcorpus.com/apps/audiopitch-pitch-monitor-6478816955",
"reason": "Same category + similar ratings"
},
{
"app_id": 6749875369,
"name": "Pitchy - Sing On Pitch",
"url": "https://appcorpus.com/apps/pitchy-sing-on-pitch-6749875369",
"reason": "Same category + similar ratings"
},
{
"app_id": 6447534878,
"name": "Tutuner — Pitch tracking tuner",
"url": "https://appcorpus.com/apps/tutuner-pitch-tracking-tuner-6447534878",
"reason": "Same category + similar ratings"
},
{
"app_id": 335449113,
"name": "iAnalyzer",
"url": "https://appcorpus.com/apps/ianalyzer-335449113",
"reason": "Same category + similar ratings"
}
],
"evidence_summary": {
"index_state": "S1",
"evidence_level": 1,
"level_label": "Live store listing",
"indexable": true,
"last_verified_at": "2026-08-07",
"unknown_fields": [
"Independent summary has not been published yet."
],
"sources": [
"App Store"
]
},
"availability_markets": {
"live": [
"us"
],
"selected": "us",
"note": null
},
"feature_events": {
"events": []
},
"features_slice": {
"plans": [
{
"code": "unlimited-usage",
"label": "Unlimited Usage",
"kind": "unknown",
"status": "store_listed",
"prices": [
{
"storefront": "us",
"formatted": "$1.99",
"billing_period": null
}
],
"trial": null
}
],
"features": [],
"unknown_features": [],
"data_cutoff": "7 Aug 2026"
}
}
