Comparison

FretFlo vs Arc Reactor Player

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

Head to head
About

FretFlo

Features
Read full description

Find a better way to play it. FretFlo helps guitarists turn chord progressions into playable voicings that work together across the fretboard. Enter your progression, choose where you want to play on the neck, and FretFlo generates two carefully selected paths through the chords. Instead of looking at each chord in isolation, FretFlo considers the progression as a whole—helping you find parts with natural voice leading, comfortable movement, and voicings that fit together musically. Whether you're working out a second guitar part at rehearsal, exploring new ways to play a familiar progression, or trying to move beyond the same open chord shapes, FretFlo gets you from chords to playing quickly. GENERATE BETTER VOICINGS Enter a progression and get playable chord shapes selected to work together—not just a list of every possible fingering. EXPLORE TWO MUSICAL PATHS Compare two different approaches to the same progression and choose the one that fits your part. CHOOSE YOUR POSITION Point FretFlo toward the area of the neck where you want to play. It's a musical starting point, not a rigid boundary, so the progression can move when a better voicing calls for it. BUILT-IN GUITAR TUNER A clean, responsive chromatic tuner is always close by when you need it. KEEP YOUR IDEAS TOGETHER Recent progressions make it easy to return to what you've been working on. GO FURTHER WITH FRETFLO PRO Unlock the full chord vocabulary, including 7ths, suspended, diminished and augmented chords. Explore alternate tunings such as Drop D, DADGAD and open tunings, create your own custom tunings, and save favorite progressions along with their tuning and neck position. FretFlo Pro is a one-time purchase. No subscription. Made for the moment between hearing the progression and finding your part.

About

Arc Reactor Player

Features
Read full description

Arc Reactor Player is a modern offline music player for iPhone and Apple Watch - made for everyone who wants to listen to their own music (MP3 & more) without streaming, without distraction and without compromise. Import audio files on iPhone, transfer them directly to the watch and enjoy smooth offline playback while training, running, commuting, traveling or in everyday life - even when the iPhone stays at home. Why Arc Reactor Player? • Transfer music & playlists to the Apple Watch: Select tracks in the iOS app, place them in the import queue and conveniently send them to the watch. • Manage your library on your iPhone: Organize titles, albums, artists and playlists clearly. • True offline listening: Playback runs directly on the watch – ideal without the Internet. • Minimalist Player: Fast, clean and system style - like a native player. • Full wrist controls: Play/Pause, Next/Previous, Shuffle, Repeat, Favorites. • Native audio output: AirPlay/Bluetooth selection as usual (e.g. AirPods, speakers). • Cover & Metadata: Title, artist, album and cover clearly displayed – on iPhone and Watch. New & Improved: • Equalizer for your individual sound • Crossfade for seamless transitions between songs • Dynamic background to match the album cover • Loudness Normalization for consistent volume across all tracks • Background Playback – Music continues playing even when the app is in the background • Low-performance mode for longer runtime and less resource consumption • Library Sorting (“Ignore The”) for clean sorting (e.g. “Beatles” instead of “The Beatles”) Supported audio formats (common formats) • MP3 (.mp3) • AAC / M4A (.aac, .m4a) • ALAC / Apple Lossless (.m4a) • WAV (.wav) • AIFF (.aif, .aiff) • CAF (.caf) • FLAC → Conversion to Apple compatible: ALAC (lossless) or AAC (space saving) (depending on source/export) Ideal for • Training without iPhone (Apple Watch + AirPods) • Offline playlists and private music collection on the watch • Anyone looking for a real MP3 player with Apple Watch support • Travel, commuting, outdoors, gym – anywhere streaming isn’t ideal Arc Reactor Player – Your music. Your wrist. Your offline player.

Screenshots

FretFlo4 screens
Arc Reactor Player4 screens

Verdict

The call

The clearest difference is update cadence: Arc Reactor Player at every 4 months against FretFlo's every 15 months. Arc Reactor Player also leads on iOS requirement (17.6 vs 26.0). On price, ads, in-app purchases and device support 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. FretFlo sells 1 one-off in-app purchase and Arc Reactor Player sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

FretFlo ships an update every 15 months, Arc Reactor Player every 4 months. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 4 level
FretFlo versus Arc Reactor Player: the parameters behind the verdict, then further details
ParameterFretFloArc Reactor Player
PriceFreeFree
Update frequencyEvery 15 monthsEvery 4 months — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS26.017.6 — better
Further details — not scored
Size3 MB15 MB
Age rating4++4
DeveloperJason BakerCJ Solution UG (haftungsbeschraenkt)

In-app purchases

1 purchases

FretFlo

One-time1
  • Premium Upgrade$7.99
1 purchases

Arc Reactor Player

One-time1
  • Unlimited Transfers$0.99

Questions

Is FretFlo free?
FretFlo is free to download, with in-app purchases available.
Is Arc Reactor Player free?
Arc Reactor Player is free to download, with in-app purchases available.
Do FretFlo or Arc Reactor Player have ads?
Neither FretFlo nor Arc Reactor Player shows ads.
Which is updated more often, FretFlo or Arc Reactor Player?
FretFlo ships an update every 15 months, and Arc Reactor Player every 4 months. Most recently, FretFlo was updated on October 28, 2026 and Arc Reactor Player on October 24, 2026.

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