Comparison

BIAS AMP 2 vs VStomp Amp

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

Head to head
About

BIAS AMP 2

Design your dream amplifier with this virtual amp designer. Replicate classic and modern amps, or build new sounds by swapping components like tubes and cabinets. Access a vast community of shared tones for endless sonic inspiration.

Highlights
  • Component-level amp modeling
  • Design custom amplifiers
  • Swap tubes, preamps, and cabinets
  • Access ToneCloud community
  • Multi-mic speaker cabinet emulation
  • Integrated reverb effects
Features
Read full description

BIAS AMP 2 Mobile is a professional virtual amp designer that offers replications of 36 of the best vintage, modern and boutique amps in rock. The app gives you the power to create new sounds by designing your own dream amplifier, letting you swap out tubes, preamps, power amps, transformers, tone stacks, cab, and microphones, all via a powerful and intuitive interface designed for your iPhone. Whether you’re a classic rocker, metalhead, jazz player, bluesman or singer-songwriter - and whether you understand how amplifier electronics work or not - you’ll be dialing in killer and exclusive tones in a heartbeat. BIAS AMP 2 Mobile adds a host of new features, including a powerful new user interface, new preamp and power amp tubes, tone stacks, Blues and Bass amp packs, new Dynamic Tone Control, new speaker cabinet module with multi-mic capability and open/closed back cabinet emulation and much more. In addition to all of these amazing new features, we’ve also partnered with legendary Celestion to create brand new custom multi-mic speaker cabs using their famed impulse responses! (Additional preamp, power amp and cab models are available via in-app purchase) BIAS AMP 2 Mobile seamlessly integrates with Positive Grid’s ToneCloud®, which is far more than a simple storage tank for your own custom tones - it’s an active community where thousands of guitarists upload, share and discuss tones. The ToneCloud® gives you access to thousands of custom amps created by artists, recording studios and guitarists like you, so you’ll never lack for sonic inspiration. To take your tones to the next level, there are 9 full-featured reverbs in BIAS AMP 2 Mobile. These aren’t just simple two-knob reverbs either - they range from lush halls and chambers to intimate rooms, and each reverb has control of decay time, mix level, high and low cut filters, damping and dwell. BIAS AMP 2 Mobile integrates seamlessly with Positive Grid's BIAS FX and JamUp guitar multi-effects app, expanding BIAS AMP 2 Mobile into a powerful and completely unified professional guitar system for live use, recording and jamming. Both JamUp and JamUp Pro include effects processors, Jam player, 8-track recorder and phrase sampler, tuner and metronome, effectively turning BIAS AMP 2 Mobile into a recording studio and top-of-the-line practice utility. BIAS AMP 2 Mobile also works with GarageBand and other audio apps using iOS’s Inter-App Audio and Audiobus. Whether you’re recording, writing songs or honing your chops—at home or on the road—BIAS products place unequaled tone at your fingertips. Features: • Complete, accurate and versatile component-level amp modeling • 36 amp models included with the introductory release, with thousands more available via the ToneCloud® • Factory categories that allow you to organize amps by music genre and sonic impact (clean, blues, glassy, crunch, metal, acoustic, and bass) • Fully customizable preamps, tone stacks, power amps, transformers, cabinets, and mic selection and placement - mix and match! • Customize the look and feel of your amp panel by changing the name, tolex, front panel and knobs • Ability to work the way guitarists think: Tweak gain and overdrive, swap out tubes and transformers, change the cabinet and mic position and shape the tone with different tone stacks and two 8-band equalizers • Noise gate • 9 lush and full-featured reverbs • Create a virtually unlimited number of custom amps • Seamless integration with BIAS FX, JamUp and JamUp Pro; open and save your amp models inside BIAS FX and JamUp with one tap (available via in-app purchase) • Works with GarageBand and other audio apps via Inter-App Audio and Audiobus Also check out BIAS AMP 2 for desktop machines (AAX/VST/AU) at: www.positivegrid.com For more information, please visit: www.positivegrid.com Twitter: @PositiveGrid facebook.com/positivegrid

About

VStomp Amp

This app provides realistic, studio-quality guitar and bass amplifier sounds on your mobile device. It uses advanced modeling technology to replicate legendary amps and cabinets, offering a simple interface for musicians to achieve great tones.

Highlights
  • Realistic amp and cab modeling
  • CDCM modeling system
  • Vintage and modern amp models
  • Classic cabinet models
  • Delay and reverb effects
  • IR loader
  • Smart noise gate
Features
Read full description

HEART POUNDING AMPLIFIERS ON THE GO The heart pounding VStomp Amp is now ready to go! Following the development of Hotone’s powerful and versatile XTOMP pedal and based on our proprietary CDCM system, VStomp Amp Mobile delivers organic, studio-grade sound quality and the exact character of legendary amplifiers – just the same as desktop version. PLAY REAL – POWERED BY CDCM SYSTEM Unlike mainstream modeling methods based on the characteristics of a certain “state” of the circuitry, which just “comes close” to the modeled sound, VStomp Amp Mobile employs a complex system based on dynamic feature modeling. In this matrix, every single circuit component is ALIVE and performs like its original. The realness of the amp and effects tones has amazed XTOMP users worldwide, and now you can experience it on the go! Behind VStomp Amp Mobile is Hotone’s CDCM (Comprehensive Dynamic Circuit Modeling) system. CDCM is built on an extremely complex dynamic variation matrix, able to realistically express every detailed change that occurs during the operational process of actual circuitry. This matrix will adjust its own modeling parameters and even framework based on the instrument input signal range, signal frequency, knob position, the instrument’s own impedance, and other variable parameters, all to achieve the closest possible characteristics of actual modeled circuitry. THE ESSENTIALS No complex signal chain. No confusing customization or combinations. You pick an amp model, pick a cab model, add some ambience – it’s that simple! The less you tweak, the more you enjoy: just pick out your rig and ROCK! FEATURES λ Grown out of next-gen XTOMP technology λ Simple-but-real guitar/bass amp simulator with easy-to-use UI λ Advanced CDCM modeling system ensures realistic playing experience λ Growing amp/cab library λ 23+ CDCM powered legendary vintage and modern amplifier models λ 20+ CDCM powered classic cabinet models λ Built-in delay and reverb effects with simple operation and huge ambience λ Built-in IR loader for applying your favorite cabs λ Built-in smart noise gate For more information: www.hotoneaudio.com

Screenshots

BIAS AMP 24 screens
VStomp Amp4 screens

Verdict

The call

BIAS AMP 2 and VStomp Amp both sit at 4.4 stars, but that hides the real split: 75% of VStomp Amp's written reviews are positive against 50% of BIAS AMP 2's. VStomp Amp also leads on iOS requirement (9.0 vs 11.0). BIAS AMP 2's advantage is ratings volume (651 vs 11). On price, rating, update cadence 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. BIAS AMP 2 sells 9 one-off in-app purchases and VStomp Amp sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

BIAS AMP 2 holds the better App Store score, 4.4 against 4.3. That said, the two scores are not equally well evidenced: BIAS AMP 2 has 651 ratings behind it against 11, so its average is the more settled of the two. Written reviews complicate that: 50% of BIAS AMP 2's written reviews are positive against 75% of VStomp Amp's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

BIAS AMP 2 ships an update monthly, VStomp Amp every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 7 level
BIAS AMP 2 versus VStomp Amp: the parameters behind the verdict, then further details
ParameterBIAS AMP 2VStomp Amp
PriceFreeFree
Rating4.4 (651 ratings) — better4.3 (11 ratings)
Positive reviews49.6% of reviews75.0% of reviews — better
Number of ratings651 — better11
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPod
Requires iOS11.09.0 — better
Further details — not scored
Size633 MB172 MB
Age rating4+4+
DeveloperPositive Grid IncHotone

Customer experience

BIAS AMP 2

All ratings651 ratings
Positive85.9%
Neutral4.0%
Negative10.1%
Written reviews270 reviews
Positive49.6%
Neutral10.7%
Negative39.6%

VStomp Amp

All ratings10 ratings
Positive90.0%
Neutral10.0%
Negative0.0%
Written reviews4 reviews
Positive75.0%
Neutral25.0%
Negative0.0%

Bugs and requests

BIAS AMP 2

Reported bugs

4 issues
  • Annoying static/feedback noises
  • Amp match feature not working
  • Unable to turn off cab simulation
  • Wireless headphone connectivity issues

Requested features

5 requests
  • Add metronome
  • Improve inter-app audio support
  • Implement AUv3 support
  • Allow restoring purchases across devices
  • Increase interface size for iPhone

VStomp Amp

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

BIAS AMP 2

One-time9
  • GlassyPack$3.99
  • CrunchPack$3.99
  • MetalPack$3.99
Show 6 more
  • Bass Pack$3.99
  • Blues Pack$3.99
  • BIAS Amp 2.0 Features Pack$6.99
  • Celestion Modern Vintage Pack$7.99
  • Celestion Classic Pack$7.99
  • BIAS Amp 2.0 Features Pack$7.99
10 purchases

VStomp Amp

One-time10
  • Dizzle 4x12$0.99
  • Dizzle VH$0.99
  • Fryman HB$0.99
Show 7 more
  • Marshell 900$0.99
  • Tangerine A30$0.99
  • BASS PACK$1.99
  • Eddie 51$1.99
  • Rector Dual$1.99
  • HIGH GAIN PACK$9.99
  • ALL-AMP PACK$29.99

Questions

Is BIAS AMP 2 free?
BIAS AMP 2 is free to download, with in-app purchases available.
Is VStomp Amp free?
VStomp Amp is free to download, with in-app purchases available.
Which has better reviews, BIAS AMP 2 or VStomp Amp?
BIAS AMP 2 is rated higher. BIAS AMP 2 averages 4.4 out of 5 from 651 ratings, while VStomp Amp averages 4.3 from 11 ratings.
Do BIAS AMP 2 or VStomp Amp have ads?
Neither BIAS AMP 2 nor VStomp Amp shows ads.
Which is updated more often, BIAS AMP 2 or VStomp Amp?
BIAS AMP 2 ships an update monthly, and VStomp Amp every 2 months. Most recently, BIAS AMP 2 was updated on November 1, 2026 and VStomp Amp on November 3, 2026.

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