Comparison

o46scope vs RetroTone

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

o46scope

Features
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o46scope is an audio measurement app for iPhone and iPad that helps you visualize sound in real time. It supports oscilloscope and FFT spectrum display, allowing you to inspect waveforms and frequency components instantly. The app also supports internal signal generation with Tone1 / Tone2 and test signal (Beep) output, making it useful for quick checks, learning, and simple audio measurement tasks. Key features • Oscilloscope display • FFT spectrum display • Signal tab for signal control • Internal signal generation with Tone1 / Tone2 • Speaker output for tones • Test signal (Beep) output • Adjustable parameters Premium Tone1 / Tone2 internal signal generation is available as a premium feature. It is available without ads. Ideal for users who want waveform visualization, frequency analysis, and signal generation in one app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

RetroTone

Features
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【日本語】 20Hzから20000Hzまで数値を直接入力してお望みの周波数をえらべます。スライダーを動かして何処まで聴こえるか試せます。432Hzや528Hzなどの周波数は、多くの人がリラックスや瞑想に活用しています。ヨガ、勉強、睡眠導入などに、自分好みの音をどうぞ。内蔵チューナーで楽器のチューニングにも使えます。シンプル設計で、レトロな雰囲気を楽しめます。 追加曲として RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz の3曲を収録しています。 【English】 Directly enter any value from 20Hz to 20,000Hz to play exactly the frequency you want, or move the slider to test your hearing range. Frequencies like 432Hz and 528Hz are loved for relaxation, meditation, yoga, study or sleep. A built-in tuner also helps you tune your instruments. Simple design with a retro vibe. Includes 3 new tracks: RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz. 【中文】 直接输入 20Hz 至 20000Hz 的任意数值即可播放您想要的频率,也可滑动滑块测试听力范围。432Hz、528Hz 等频率深受放松、冥想与专注人群喜爱,适合瑜伽、学习与助眠。内置调音器还可为乐器调音。设计简洁,尽享复古音色。 新增3首曲目:RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz。 【한국어】 20Hz~20000Hz 값을 직접 입력해 원하는 주파수를 재생하거나, 슬라이더로 가청 범위를 테스트할 수 있습니다. 432Hz·528Hz 등의 주파수는 휴식·명상·요가·공부·수면에 좋습니다. 내장 튜너로 악기 튜닝에도 사용할 수 있습니다. 심플한 디자인의 레트로 사운드. 추가 곡 3곡 수록: RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz. 【Español】 Introduce cualquier valor de 20Hz a 20.000Hz para reproducir la frecuencia exacta que quieras, o usa el deslizador para probar tu rango auditivo. Frecuencias como 432Hz y 528Hz son ideales para relajación, meditación, yoga, estudio o dormir. Un afinador integrado también afina tus instrumentos. Diseño sencillo y retro. Incluye 3 pistas nuevas: RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz. 【Français】 Saisissez une valeur de 20Hz à 20 000Hz pour jouer la fréquence souhaitée, ou utilisez le curseur pour tester votre audition. Des fréquences comme 432Hz et 528Hz sont parfaites pour la relaxation, la méditation, le yoga, l'étude ou le sommeil. Un accordeur intégré accorde aussi vos instruments. Design simple et rétro. Comprend 3 nouveaux titres : RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz. 【Deutsch】 Geben Sie einen Wert von 20Hz bis 20.000Hz ein, um die gewünschte Frequenz abzuspielen, oder testen Sie mit dem Schieberegler Ihren Hörbereich. Frequenzen wie 432Hz und 528Hz sind ideal für Entspannung, Meditation, Yoga, Lernen oder Schlaf. Ein integriertes Stimmgerät stimmt auch Instrumente. Schlichtes Retro-Design. Enthält 3 neue Titel: RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz. 【Português】 Insira qualquer valor de 20Hz a 20.000Hz para tocar a frequência desejada, ou use o controle deslizante para testar sua audição. Frequências como 432Hz e 528Hz são ótimas para relaxamento, meditação, yoga, estudo ou sono. Um afinador integrado também afina seus instrumentos. Design simples e retrô. Inclui 3 novas faixas: RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz. 【Italiano】 Inserisci un valore da 20Hz a 20.000Hz per riprodurre la frequenza desiderata, o usa il cursore per testare il tuo udito. Frequenze come 432Hz e 528Hz sono perfette per relax, meditazione, yoga, studio o sonno. Un accordatore integrato accorda anche i tuoi strumenti. Design semplice e retrò. Include 3 nuove tracce: RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz. 【Русский】 Введите любое значение от 20 Гц до 20 000 Гц, чтобы воспроизвести нужную частоту, или используйте ползунок для проверки слуха. Частоты 432 Гц и 528 Гц идеальны для расслабления, медитации, йоги, учёбы и сна. Встроенный тюнер также настроит инструменты. Простой ретро-дизайн. Включает 3 новых трека: RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz. 【العربية】 أدخل أي قيمة من 20Hz إلى 20000Hz لتشغيل التردد الذي تريده، أو استخدم شريط التمرير لاختبار سمعك. ترددات مثل 432Hz و528Hz مثالية للاسترخاء والتأمل واليوغا والدراسة والنوم. كما يضبط موالف مدمج آلاتك الموسيقية. تصميم بسيط بطابع ريترو. يتضمن 3 مقاطع جديدة: RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz.

Screenshots

o46scope4 screens
RetroTone4 screens

Verdict

The call

The clearest difference is in-app purchases: RetroTone at none against o46scope's 1. RetroTone also leads on update cadence (weekly vs every 6 weeks). o46scope's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 26.2). On price and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. o46scope sells 1 in-app purchase, starting at $19.99 per year. RetroTone asks for nothing beyond the download.

UpkeepUpdate frequency

o46scope ships an update every 6 weeks, RetroTone weekly. The most recent releases landed on September 10, 2026 and August 23, 2026 respectively.

Scorecard4 real differences · 2 level
o46scope versus RetroTone: the parameters behind the verdict, then further details
Parametero46scopeRetroTone
PriceFreeFree
Update frequencyEvery 6 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better26.2
Further details — not scored
Size53 MB101 MB
Age rating4+4+
DeveloperShinsuke TsutsuiHIROSHI SHINKAWA

In-app purchases

1 purchases

o46scope

Subscriptions1
  • Premium7 Days trial$19.991 Year
None

RetroTone

No in-app purchases

Questions

Is o46scope free?
o46scope is free to download, with in-app purchases available.
Is RetroTone free?
RetroTone is free to download, with no in-app purchases.
Do o46scope or RetroTone have ads?
Neither o46scope nor RetroTone shows ads.
Which is updated more often, o46scope or RetroTone?
o46scope ships an update every 6 weeks, and RetroTone weekly. Most recently, o46scope was updated on September 10, 2026 and RetroTone on August 23, 2026.

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