AppCorpus MCP gives your agent current app data, prices, screens, features and sources.
View JSON
GET /api/v3/apps/1558441265
{
"app_id": 1558441265,
"canonical_url": "https://appcorpus.com/apps/circle-of-fifths-1558441265",
"identity": {
"name": "Circle of Fifths",
"slug": "circle-of-fifths",
"developer": {
"name": "Josh Liebe (Pty) Ltd",
"url": "https://appcorpus.com/developers/josh-liebe-pty-ltd-developer_5b7176b45f92243f3f3b319511eaf39e"
},
"icon_url": "https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/22/e0/75/22e075a3-5a8e-0dfa-322b-afd3cd5e9e3d/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/512x512bb.jpg",
"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": [
{
"store": "apple",
"status": "ACTIVE",
"url": "https://apps.apple.com/us/app/circle-of-fifths/id1558441265?uo=4",
"rating": 4.9,
"rating_count": 228,
"formatted_price": "Free",
"is_free": true,
"has_iap": false,
"has_subscription": false,
"version": "1.1.9",
"updated": "2026-05-30",
"currency": "USD"
}
],
"summary": {
"one_liner": null,
"summary": null,
"best_for": [],
"not_for": [],
"status": "fallback",
"at_a_glance": [
"Free to download"
]
},
"categories": {
"official": [
"Music",
"Utilities"
],
"appcorpus": [
{
"category_id": "music",
"label": "Music",
"url": "https://appcorpus.com/categories/music"
},
{
"category_id": "utilities",
"label": "Utilities",
"url": "https://appcorpus.com/categories/utilities"
}
]
},
"use_cases": [],
"features": [
{
"capability_id": "free_app",
"label": "Free app",
"availability": "yes",
"access_level": "free",
"scope": null,
"evidence": "Store published"
}
],
"pricing": [
{
"store": "apple",
"formatted_price": "Free",
"is_free": true,
"has_iap": false,
"has_subscription": false,
"currency": "USD",
"market": "us",
"last_verified": "2026-08-07",
"rows": [
"Free"
]
}
],
"screens": [
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/3f/94/2a/3f942ab5-a147-cf9c-d868-8979bcd43833/2d503ec2-da0b-4149-9ad5-547538d0b308_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00283rd_generation_U0029_-_2021-10-21_at_10.52.26.png/1600x1600bb.jpg",
"store": "apple",
"platform": "ipad",
"alt": "Circle of Fifths ipad screenshot 1"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/34/94/32/34943204-fc93-576f-112f-fa28ba738272/25cd219c-0dc4-4382-abba-9a441038665b_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00282nd_generation_U0029_-_2021-10-21_at_11.01.20.png/576x768bb.png",
"store": "apple",
"platform": "ipad",
"alt": "Circle of Fifths ipad screenshot 2"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource125/v4/8e/20/1e/8e201e36-7579-4c9a-baea-20b8109bb47c/818f7e6f-7702-41cd-b01b-97afbbbfc901_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00283rd_generation_U0029_-_2021-10-21_at_10.52.39.png/1600x1600bb.jpg",
"store": "apple",
"platform": "ipad",
"alt": "Circle of Fifths ipad screenshot 3"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource125/v4/e1/d0/85/e1d0851e-6adf-b228-724d-21b3f6d7ceb4/e87e5ff1-7b3c-4067-8afc-4998707e4691_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00282nd_generation_U0029_-_2021-10-21_at_11.01.29.png/576x768bb.png",
"store": "apple",
"platform": "ipad",
"alt": "Circle of Fifths ipad screenshot 4"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/eb/4a/78/eb4a78f9-3104-666a-521e-c4c8e9fe4985/1a80191d-e40f-4cf7-ac46-1d2f4b7a178f_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00283rd_generation_U0029_-_2021-10-21_at_10.53.03.png/1600x1600bb.jpg",
"store": "apple",
"platform": "ipad",
"alt": "Circle of Fifths ipad screenshot 5"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/d6/6c/01/d66c0105-b430-f2fd-4fdb-d8c7d9282a67/b4c076ee-5668-4fab-a860-f04c591b5285_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00282nd_generation_U0029_-_2021-10-21_at_11.02.54.png/576x768bb.png",
"store": "apple",
"platform": "ipad",
"alt": "Circle of Fifths ipad screenshot 6"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/3e/8d/ea/3e8dea67-d96e-743d-3158-ee5b458b3860/c2bb5d4d-c368-4cab-9ed6-012c9869d6ff_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00283rd_generation_U0029_-_2021-10-21_at_10.53.26.png/1600x1600bb.jpg",
"store": "apple",
"platform": "ipad",
"alt": "Circle of Fifths ipad screenshot 7"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource125/v4/0b/ab/b4/0babb462-011d-0586-3153-cc6b223977db/3b5757fb-c191-470e-8692-d8dd70c0572c_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00282nd_generation_U0029_-_2021-10-21_at_11.02.14.png/576x768bb.png",
"store": "apple",
"platform": "ipad",
"alt": "Circle of Fifths ipad screenshot 8"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/5f/40/c4/5f40c45e-cad0-ccf9-53d5-c02c48793bb9/d544eec4-01ab-4538-b395-8b529b4f679f_Simulator_Screen_Shot_-_iPhone_11_Pro_Max_-_2021-10-21_at_10.43.13.png/1242x1600bb.jpg",
"store": "apple",
"platform": "iphone",
"alt": "Circle of Fifths iphone screenshot 9"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/6d/52/ee/6d52ee20-b041-9b34-93c8-8209fb47350c/6163a49b-3dd4-488b-a2c6-52ca6a275ba0_Simulator_Screen_Shot_-_iPhone_11_Pro_Max_-_2021-10-21_at_10.43.42.png/1242x1600bb.jpg",
"store": "apple",
"platform": "iphone",
"alt": "Circle of Fifths iphone screenshot 10"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/d0/f3/30/d0f33075-e24d-c7d9-aeb7-391418a9c62d/a6961033-f96f-466a-8215-ae0fcce11eec_Simulator_Screen_Shot_-_iPhone_11_Pro_Max_-_2021-10-21_at_10.44.05.png/1242x1600bb.jpg",
"store": "apple",
"platform": "iphone",
"alt": "Circle of Fifths iphone screenshot 11"
},
{
"url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource116/v4/17/10/e6/1710e628-fe73-f3a3-188e-73ccffe2864c/470122a6-6bd8-41b0-be73-44d2419dc79d_Simulator_Screen_Shot_-_iPhone_11_Pro_Max_-_2021-10-21_at_10.44.30.png/1242x1600bb.jpg",
"store": "apple",
"platform": "iphone",
"alt": "Circle of Fifths iphone screenshot 12"
}
],
"ratings": [
{
"store": "apple",
"average": 4.9,
"count": 228,
"market": "us",
"observed_at": "2026-08-07",
"reviews": [
{
"rating": 5,
"title": "I’ve been looking for a free version like this for years!",
"body": "This is exactly the app I’ve been looking for to help with music creation. The best part is that simple features aren’t locked behind a pay wall lol. I can’t express how good it is to know that someone out there who made this app believes in music accessibility and demystifying creative technical tools.",
"author": "Tootsoonn",
"date": "7 Aug 2026"
},
{
"rating": 4,
"title": "I like it",
"body": "Still teaching myself the circle but this app and another similar app are helping. It is great when the app creators have audio to let you know what it should sound like. If you are using a Circle of 5ths app without audio, you need to get rid of it. I have tried several and settled on just two, both with audio. Goes great with the Guitar Grimoire book series. If I were to ask for something more to set this app apart and be the ONLY Circle of 5th’s app, I would request the inclusion of other scale examples: Dorian, Locrian, Mixolydian, etc.",
"author": "lofidelityrockr",
"date": "7 Aug 2026"
},
{
"rating": 5,
"title": "Very nice, simple app",
"body": "If I may suggest an improvement, I’d like to be able to toggle from the arpeggios version to the chord version in an easier way. Example: short press gives the default setting, long press gives the other one. And/Or have a setting that plays the arpeggiated chord first, followed by the full chord.",
"author": "Utilisateur payant",
"date": "7 Aug 2026"
},
{
"rating": 5,
"title": "Well Done",
"body": "This is a great app. Easy to use. It would be even better if you could choose to change all of the Flat Major Chords to Sharps. Currently you can only choose making G flat into F sharp. And if they could add a testing feature, it would facilitate one’s memorizing of the circle.",
"author": "Eduardo Playa",
"date": "7 Aug 2026"
},
{
"rating": 5,
"title": "Helps my progressions/modal recognition",
"body": "I can’t believe this is free! I was just browsing for a beatmakers app and this was free so I got it. What a surprise!! I’m very grateful to be able to have access to development by actual musicians who understand the placement of notation in the middle helps my memorization of it.",
"author": "Rank Avid Listener",
"date": "7 Aug 2026"
}
]
}
],
"privacy": [
{
"store": "apple",
"declarations": [
{
"title": "Data Not Collected",
"detail": "",
"source": "Developer declared"
}
],
"accessibility": []
}
],
"changes": [
{
"store": "apple",
"version": "1.1.4",
"released_at": null,
"notes": ""
},
{
"store": "apple",
"version": "1.1.5",
"released_at": null,
"notes": "Updated UI to align more closely with Apple Human Interface Guidelines Updated audio engine"
},
{
"store": "apple",
"version": "1.1.8",
"released_at": null,
"notes": "I know it's been a while... But wait no longer! Here's a little update to keep things fresh. Included in this version: - Germanic notation - Open Key Notation - Hide or show diminished chords - Improvements and bug fixes"
},
{
"store": "apple",
"version": "1.1.9",
"released_at": "2026-05-30",
"notes": "It's been a minute but it's time for an update! Included in this version: - Fixes an issue where tapping the more menu would immediately dismiss the action sheet"
}
],
"alternatives": [
{
"app_id": 788423364,
"name": "Autochords",
"url": "https://appcorpus.com/apps/autochords-788423364",
"reason": "Same category + similar ratings"
},
{
"app_id": 1242467844,
"name": "TONALY: Songs, Scales & Theory",
"url": "https://appcorpus.com/apps/tonaly-songs-scales-theory-1242467844",
"reason": "Same category + similar ratings"
},
{
"app_id": 598574333,
"name": "Piano Chords, Scales Companion",
"url": "https://appcorpus.com/apps/piano-chords-scales-companion-598574333",
"reason": "Same category + similar ratings"
},
{
"app_id": 714086944,
"name": "Piano Chords and Scales",
"url": "https://appcorpus.com/apps/piano-chords-and-scales-714086944",
"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": "free",
"label": "Free",
"kind": "free",
"status": "inferred",
"prices": [],
"trial": null
}
],
"features": [],
"unknown_features": [],
"data_cutoff": "7 Aug 2026"
}
}
