Comparison

BIAS AMP 2 vs AmpStamp

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

AmpStamp

This app recreates vintage guitar tones with models of classic amps, effects, and cabinets. Customize your sound, save presets, and use MIDI controllers for hands-free operation. Expand your sonic palette with individual purchases or an all-access subscription.

Highlights
  • Vintage amplifier modeling
  • Classic effects and cabinet simulations
  • Customizable sound presets
  • MIDI controller support
  • In-app Gear Shop
  • All-access subscription option
Features
Read full description

AmpStamp is a best-in-class audio processing tool for Mac, iPad & iPhone, built on true component models of vintage amplifiers and effects, with a deep library of speaker cabinets and reverbs. These are real circuit models, not captured snapshots frozen at a single setting—turn any knob and the whole amp responds the way the original hardware would. Our goal is to recreate guitar tones heard on classic albums—dial them in exactly, then push past what the hardware allowed or what was even possible at the time of recording. --- VINTAGE GEAR DONE RIGHT The mobile revolution for guitar is just beginning and we are in the process of building a definitive catalogue of the most desirable tones based on accurate models of vintage amplifiers and effects, all at your finger tips. Not only can you play along with your favorite records, you can sound exactly like them too. DRAG, DROP, ROCK We design simple interfaces that refocus energy on playing something cool. There’s no need to fumble with mic selection or placement, each amplifier has been tuned to sound exactly like the records that employed them. CONSTANTLY EVOLVING AND GETTING BETTER With an inexpensive subscription, you gain complete access to all of our products including future releases. It’s the best way to take full advantage of our technology as the application becomes more valuable over time. We’re continuing to track down great pieces of vintage gear so you’re going to want to be plugged in and ready. The history of rock n’ roll sound is at your fingertips. --- FEATURES - Universal App available on Mac, iPad & iPhone - Run as Standalone or Audio Unit (AUv3) App Extension - High-resolution audio—support for 44.1/48/96/192kHz sampling rates - Stereo output with Ambience effects - MIDI support for hands-free control - Sidechain input for select effects - Cabinet Drive for select effects - Free TU101 Strobe Tuner now available, ±0.1 cent typical accuracy - NEW Transformer Saturation for select amps If you choose to subscribe either monthly or yearly, payment will be charged to your Apple Account at confirmation of purchase. Your subscription will automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period. Your subscription may be managed and auto-renewal may be turned off by going to Account Settings after purchase. Terms Of Use: https://themusicologygroup.com/ampstamp/terms-of-use Privacy Policy: https://themusicologygroup.com/privacy/

Screenshots

BIAS AMP 24 screens
AmpStamp4 screens

Verdict

The call

The clearest difference is ratings volume: BIAS AMP 2 at 651 against AmpStamp's 32. BIAS AMP 2 also leads on iOS requirement (11.0 vs 15.0). AmpStamp's advantage is device support (4 vs 2). On price, rating, review sentiment and update cadence 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 AmpStamp sells 10 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for BIAS AMP 2 against 4.4 for AmpStamp. That said, the two scores are not equally well evidenced: BIAS AMP 2 has 651 ratings behind it against 32, so its average is the more settled of the two. Written reviews are what separate them: 50% of BIAS AMP 2's written reviews are positive against 55% of AmpStamp's.

UpkeepUpdate frequency

BIAS AMP 2 ships an update monthly, AmpStamp every 6 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard3 real differences · 7 level
BIAS AMP 2 versus AmpStamp: the parameters behind the verdict, then further details
ParameterBIAS AMP 2AmpStamp
PriceFreeFree
Rating4.4 (651 ratings) — better4.4 (32 ratings)
Positive reviews49.6% of reviews54.5% of reviews — better
Number of ratings651 — better32
Update frequencyMonthly — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS11.0 — better15.0
Further details — not scored
Size633 MB289 MB
Age rating4+4+
DeveloperPositive Grid IncThe Musicology Group, Inc.

Customer experience

BIAS AMP 2

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

AmpStamp

All ratings32 ratings
Positive87.5%
Neutral3.1%
Negative9.4%
Written reviews11 reviews
Positive54.5%
Neutral9.1%
Negative36.4%

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

AmpStamp

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

AmpStamp

Subscriptions2
  • AmpStamp14 Days trial$4.991 Month
  • AmpStamp14 Days trial$49.991 Year
One-time8
  • WH100 WahFree
  • VG402C Amplifier$3.99
  • VG205E Amplifier$3.99
Show 5 more
  • VG402B Amplifier$3.99
  • EC101C Echo$3.99
  • VG302E Amplifier$3.99
  • VG207A Amplifier$3.99
  • VG 2X12C 100W '68 Cabinet$4.99

Questions

Is BIAS AMP 2 free?
BIAS AMP 2 is free to download, with in-app purchases available.
Is AmpStamp free?
AmpStamp is free to download, with in-app purchases available.
Which has better reviews, BIAS AMP 2 or AmpStamp?
BIAS AMP 2 is rated higher. BIAS AMP 2 averages 4.4 out of 5 from 651 ratings, while AmpStamp averages 4.4 from 32 ratings.
Do BIAS AMP 2 or AmpStamp have ads?
Neither BIAS AMP 2 nor AmpStamp shows ads.
Which is updated more often, BIAS AMP 2 or AmpStamp?
BIAS AMP 2 ships an update monthly, and AmpStamp every 6 weeks. Most recently, BIAS AMP 2 was updated on November 1, 2026 and AmpStamp on November 2, 2026.

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