Check the acquisition promise
Read the store headline, screenshots and description. What problem is the app promising to solve?
Study the storefront ↗02 / Storefront & product
Where the click lands.
Study the product story and store experience behind the acquisition funnel.
Screenshots
03 / Market context
The business behind the app.
Keep revenue, downloads and store rankings separate from advertising performance.
How Much Does Interval Calculator & Quiz Make?
Monthly Revenue
$1.0K
Annualized estimate
$12.0K
Per Download
$1.00
Platform Performance
🍎iOS
Revenue
$1.0K
Downloads
1.0K
Rating
4.3 ★(6)
Rating Distribution
4.3
★★★★☆
6 reviews
5
17%
4
0%
3
0%
2
0%
1
83%
Top Countries
🇰🇷 KR🇷🇴 RO🇪🇪 EE
Reviews (1)▼
★☆☆☆☆Filote Vinson2/17/2024
Bogus billing/Can’t upgrade/Do NOT buy!!
Wow, this is ridiculous. I would give zero stars if I could: I paid for the upgrade to the app, but never received the upgrade. I called Apple and they said I have to contact the developer. Ookaaay, but the page in the App Store has no way to contact the developer. Apple says they can’t contact the developer. Ummmm, you communicated with them when you received the app from the developer, right? You communicated with the developer when you negotiated price and terms, right? Or did the app just magically appear in the App Store? Since Apple manages purchases and upgrades directly with the consumer, shouldn’t there be a way for them to trigger the upgrade? Is it that they are too lazy to try to truly help the customer…Or maybe too cost conscious, or incompetent? Definitely not the business model upon which Apple was founded. It’s too bad because the basic app is quite good, but very limited.
Version History (15)▼
5.9.859/2/2026
5.9.77/24/2026
5.9.67/21/2026
5.9.02/4/2026
5.5.81/23/2026
5.5.01/13/2026
5.3.91/10/2026
5.3.71/9/2026
5.3.61/8/2026
1.485/2/2024
Available In (115 Countries)▼
🇺🇸 United States🇦🇺 Australia🇨🇦 Canada🇨🇳 China🇫🇷 France🇩🇪 Germany🇬🇧 United Kingdom🇮🇹 Italy🇯🇵 Japan🇰🇷 South Korea🇷🇺 Russia🇩🇿 DZ🇦🇴 AO🇦🇷 Argentina🇦🇹 Austria🇦🇿 AZ🇧🇭 BH🇧🇧 BB🇧🇾 BY🇧🇪 Belgium🇧🇲 BM🇧🇷 Brazil🇧🇬 Bulgaria🇨🇱 Chile🇨🇴 Colombia🇨🇷 CR🇭🇷 Croatia🇨🇾 CY🇨🇿 Czech Republic🇩🇰 Denmark🇩🇴 DO🇪🇨 EC🇪🇬 Egypt🇸🇻 SV🇫🇮 Finland🇬🇭 GH🇬🇷 Greece🇬🇹 GT🇭🇰 Hong Kong🇭🇺 Hungary🇮🇳 India🇮🇩 Indonesia🇮🇪 Ireland🇮🇱 Israel🇰🇿 KZ🇰🇪 Kenya🇰🇼 KW🇱🇧 LB🇱🇹 Lithuania🇱🇺 LU🇲🇴 MO🇲🇬 MG🇲🇾 Malaysia🇲🇹 MT🇲🇽 Mexico🇳🇱 Netherlands🇳🇿 New Zealand🇳🇬 Nigeria🇳🇴 Norway🇴🇲 OM🇵🇰 Pakistan🇵🇦 PA🇵🇪 Peru🇵🇭 Philippines🇵🇱 Poland🇵🇹 Portugal🇶🇦 QA🇷🇴 Romania🇸🇦 Saudi Arabia🇷🇸 RS🇸🇬 Singapore🇸🇰 Slovakia🇸🇮 Slovenia🇿🇦 South Africa🇪🇸 Spain🇱🇰 LK🇸🇪 Sweden🇨🇭 Switzerland🇹🇼 Taiwan🇹🇭 Thailand🇹🇳 TN🇹🇷 Turkey🇺🇦 Ukraine🇦🇪 UAE🇺🇾 UY🇺🇿 UZ🇻🇪 VE🇻🇳 Vietnam🇧🇴 BO🇰🇭 KH🇪🇪 Estonia🇱🇻 Latvia🇳🇮 NI🇵🇾 PY🇦🇫 AF🇬🇪 GE🇮🇶 IQ🇱🇾 LY🇲🇦 MA🇲🇿 MZ🇲🇲 MM🇾🇪 YE🇧🇯 BJ🇧🇫 BF🇨🇲 CM🇨🇬 CG🇨🇮 CI🇯🇴 JO🇱🇦 LA🇲🇱 ML🇸🇳 SN🇹🇿 TZ🇺🇬 UG🇿🇲 ZM🇿🇼 ZW
Supported Languages (9)▼
EnglishFrenchGermanItalianJapaneseKoreanPortugueseChineseSpanish
App Details▼
Intervals are a core part of music theory. By understanding the concepts and practicing consistently, anyone can build a solid foundation in music. Th...
Publisher
HEE GWANG KIM
So
In-App Purchases (1)
| Name | Price | Type |
|---|---|---|
| Music Interval App Premium | $7.99 | One-time |
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