Comparison

THR Session vs REACTOR

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

Head to head
About

THR Session

Learn guitar songs more effectively by slowing down audio, changing pitch, and isolating instrument parts. Practice with your own music library and even mute original guitar or bass tracks to play along.

Highlights
  • Slow down songs without losing quality
  • Change song pitch
  • Repeat song segments
  • Cancel original guitar/bass sound
  • Isolate guitar/bass parts
  • Adjust tempo between 50-100%
Features
Read full description

Learn songs faster and easier and play along with your music library like never before. THR Session will change your daily guitar practice forever. You can slow down songs without losing audio quality, change the pitch or repeat any segment of a song to learn even the trickiest guitar part. It even allows you to cancel out the original guitar sound; it’s like playing a session with your dream band! This app is the perfect audio toolbox for today’s guitarist and with a Yamaha THR amp, gives you a practice experience like no other. ■Features ○Guitar Cancellation/Extraction ・Cancellation: Mute the guitar and/or Bass sound from the songs in your iOS device library. ・Extraction: Isolate the guitar and/or bass parts to help you learn songs by ear ・Preset: 3 presets (Guitar High Mode / Guitar Low Mode / Bass Mode) to help you quickly find the instrument you want to cancel. ○Audio Play Functions ・A-B Repeat: Repeatedly plays a selected segment of a song. ・Key Transpose: Changes pitch of songs(± one whole step) ・Slow Down: Changes tempo of songs with no effect on the pitch(50-100%) ■System Requirement Compatible with iOS6.0 or later

About

REACTOR

This app generates guitar tones by analyzing audio, images, or text descriptions. It offers deep control over amp models and effects, allowing users to create, save, and share custom sounds with a community. Requires a compatible amplifier for full functionality.

Highlights
  • AI-powered tone generation from audio, image, or text
  • 24 amp models with deep parameter control
  • 8 simultaneous effect slots
  • Drag-and-drop signal path editing
  • Custom amp creation and sharing
  • Preset library and onboard amp slots
  • Built-in tuner
Features
Read full description

Your imagination deserves an amplifier. REACTOR is the companion app for the REACTOR intelligent guitar combo amp — powered by Amp Intelligence™, a sound engine trained on over 1 million tones and the circuit-level DNA of 200+ legendary amp designs. Type an idea. Snap a photo. Drop in a recording. REACTOR builds the full signal chain in seconds. CREATOR HUB — THREE WAYS TO BUILD TONE • Audio to Tone. Upload a track or record a clip. Amp Intelligence analyzes the sound and rebuilds it as a playable guitar tone. • Image to Tone. See an amp, a pedalboard, or a setup that inspires you. Snap it. The app turns the photo into a matching tone. • Text to Tone. Describe an amp, an artist, or a feel in your own words. Amp Intelligence figures out the signal chain and makes it playable. • Build your own amps. Combine characteristics, shape deep parameters, and create original amp voices that don't exist anywhere else. Name them, save them, share them. DEEP CONTROL, INSTANT CHANGES • 24 amp models to start — full parameter access to gain structure, EQ, bias, and voicing • 8 simultaneous effect slots across Gate, Compressor, Drive, Modulation, Delay, Reverb, Wah, and EQ • Drag-and-drop signal path — reorder effects anywhere, insert the FX loop at any point • Unlimited preset library, organized by song, session, or genre • Assign presets to 8 onboard amp slots for instant recall on stage • Built-in tuner TONE MEMORY REACTOR remembers your prompts, inputs, and adjustments. Every time you create, it starts closer to the sound in your head. TONECLOUD Browse and download tones and custom amps from other players. Share your own. Discover patches built by artists and the global REACTOR community. CONNECTS TO YOUR AMP Pair over Bluetooth or Wi-Fi. Push presets and custom amps to your REACTOR combo amp. Pull them back to the app to edit, refine, or share. Now tone answers to you. — Requires a REACTOR 50 or REACTOR 100 amp for full functionality.

Screenshots

THR Session2 screens
REACTOR4 screens

Verdict

The call

The clearest difference is rating: REACTOR at 3.4 against THR Session's 2.6. REACTOR also leads on update cadence (every 3 weeks vs every 3 months) and review sentiment (47% vs 34%). THR Session's advantage is iOS requirement (8.0 vs 17.0). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

REACTOR holds the better App Store score, 3.4 against 2.6. Both are backed by a comparable volume of ratings — 16 and 23 respectively. Written reviews point the same way: 34% of THR Session's written reviews are positive against 47% of REACTOR's.

UpkeepUpdate frequency

THR Session ships an update every 3 months, REACTOR every 3 weeks. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 6 level
THR Session versus REACTOR: the parameters behind the verdict, then further details
ParameterTHR SessionREACTOR
PriceFreeFree
Rating2.6 (16 ratings)3.4 (23 ratings) — better
Positive reviews34.3% of reviews46.7% of reviews — better
Number of ratings1623 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod — betteriPhone
Requires iOS8.0 — better17.0
Further details — not scored
Size3 MB713 MB
Age rating4+4+
DeveloperYamaha Corporation of AmericaPositive Grid Inc

Customer experience

THR Session

All ratings16 ratings
Positive37.5%
Neutral12.5%
Negative50.0%
Written reviews35 reviews
Positive34.3%
Neutral11.4%
Negative54.3%

REACTOR

All ratings23 ratings
Positive56.5%
Neutral8.7%
Negative34.8%
Written reviews15 reviews
Positive46.7%
Neutral6.7%
Negative46.7%

In-app purchases

None

THR Session

No in-app purchases

None

REACTOR

No in-app purchases

Questions

Is THR Session free?
THR Session is free to download, with no in-app purchases.
Is REACTOR free?
REACTOR is free to download, with no in-app purchases.
Which has better reviews, THR Session or REACTOR?
REACTOR is rated higher. THR Session averages 2.6 out of 5 from 16 ratings, while REACTOR averages 3.4 from 23 ratings.
Do THR Session or REACTOR have ads?
Neither THR Session nor REACTOR shows ads.
Which is updated more often, THR Session or REACTOR?
THR Session ships an update every 3 months, and REACTOR every 3 weeks. Most recently, THR Session was updated on October 7, 2026 and REACTOR on October 8, 2026.

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