THR Session vs REACTOR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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%
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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
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.
- 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
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | THR Session | REACTOR |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (16 ratings) | 3.4 (23 ratings) — better |
| Positive reviews | 34.3% of reviews | 46.7% of reviews — better |
| Number of ratings | 16 | 23 — better |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 3 MB | 713 MB |
| Age rating | 4+ | 4+ |
| Developer | Yamaha Corporation of America | Positive Grid Inc |
Customer experience
THR Session
REACTOR
In-app purchases
THR Session
No in-app purchases
REACTOR
No in-app purchases









