RadauApp vs FlexTunerPro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RadauApp
Transform an old iPhone into a child-friendly music player. It supports Apple Music, MP3s, podcasts, and web radio with a simple, intuitive interface. A parent mode allows for easy media management and content control.
- Plays Apple Music & MP3s
- Supports podcasts and web radio
- Simple, icon-based interface
- Parent mode for media management
- Childproof access lock
- Reuses old devices
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RadauApp – The eco-friendly alternative to kids’ music boxes #Works with iPhone 6s and newer Got an old iPhone lying around? Perfect! With RadauApp, you can turn it into a super simple music box for your little ones – packed with: • Apple Music & your own MP3s • Favorite podcasts • Kid-friendly web radio The interface is intentionally kept simple – no reading skills required. Big tiles, intuitive icons, no distractions. Just tap – and the music plays! Parent Mode included In the protected parent zone, you can: • Manage media (playlists, podcasts, radio stations) • Change cover artwork • Add or remove content All childproofed with a simple access lock. Why RadauApp? • Skip the expensive hardware (like the T-Box) • Reuse devices instead of throwing them away • Full control & privacy – no cloud required
FlexTunerPro
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Key Features ◆ 3 Tuning Modes • Tuner(Auto): Automatically detects and tunes played strings • Tuner(Manual): Select specific strings for precise tuning • Practice: Ear training mode with reference tones ◆ Instrument Profiles • 6-String Guitar (Standard tuning) • 7-String Guitar• 4-String Bass • 5-String Bass • Ukulele (Soprano) • Contrabass and other Strings Instruments • Create custom profiles ◆ Customization • A4 reference pitch adjustment (430-450Hz) • Individual string frequency settings • Supports tuning for situations such as when using a guitar capo through overall pitch adjustment • Profile export/import • Guide tone waveform can be changed from Profile Edit. Available waveforms: Sawtooth, Square, Triangle, and Original (easier to hear in low frequency ranges) ◆ User-Friendly • Large, clear tuning meter • Precise cent display • Auto-lock prevention during tuning • Japanese/English support ※ Important Note Due to the harmonics produced by musical instruments, the octave of the detected pitch may sometimes be incorrectly identified. Please note that there is currently no available method to improve this misdetection issue. 30-Day Free Trial Try all features free for 30 days. Premium Version After the trial period, a one-time purchase is required to continue using the app. Once purchased, enjoy all features forever.
Screenshots
Verdict
The clearest difference is in-app purchases: RadauApp at none against FlexTunerPro's 1. RadauApp also leads on update cadence (every 3 days vs every 2 months) and device support (3 vs 1). 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
Both are free to download. FlexTunerPro sells 1 one-off in-app purchase. RadauApp asks for nothing beyond the download.
RadauApp ships an update every 3 days, FlexTunerPro every 2 months. The most recent releases landed on October 1, 2026 and October 9, 2026 respectively.
| Parameter | RadauApp | FlexTunerPro |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 18.5 |
| Further details — not scored | ||
| Size | 2 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Jens Becker | SATOSHI NAGASAKA |
In-app purchases
RadauApp
No in-app purchases
FlexTunerPro
- Premium$2.99









