Comparison

TestTone vs JMP Pro

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

Head to head
About

TestTone

Features
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This test signal generator is ideal for checking audio equipment and confirming audible frequency ranges.It can play sine, triangle, sawtooth, and square waves from 20 Hz to 20 kHz, as well as white noise and pink noise. Features • You can switch between preset frequencies, white noise, and pink noise using the frequency preset buttons. You can also tap the frequency display area to enter any desired frequency manually. The frequency can also be adjusted using the left/right buttons or by tapping the frequency display. • Supports switching between sine, triangle, sawtooth, and square waveforms. • Playback starts or stops by tapping the ON/OFF button or the icon at the top. Note Playing at high volumes may cause hearing damage or damage to your audio equipment. Please use with caution.

About

JMP Pro

This app emulates a classic guitar preamplifier, offering four distinct channels for various tones from clean to high-gain metal. It includes a power amplifier, digital delay, analog modulations, and reverb. It functions as a standalone app or an audio effect.

Highlights
  • Four distinct amplifier channels
  • Virtual EL34 power amplifier
  • Digital delay with filter and offset
  • Analog chorus and tremolo modulation
  • Hall reverb algorithm
  • Noise gate and studio compressor
Features
Read full description

PREAMPLIFIER Nembrini Audio JMP Pro Guitar Amplifier plugin is based on a Marshall JMP1* preamplifier. JMP Pro Valve Amplifier drives pure tone into each of its four uniquely voiced channels OD1, OD2, Clean1 and Clean2 OD1: This channel’s smouldering power will take you from the molten gold of a classic British sound, to searing metal and all points in between. OD2: Tightly focused, high gain is served up here by the truckload. Modern and aggressive, yet fluid and toneful. This channel has all the distortion and sustain you’ll ever need. Clean1: It is perfect for warm full-bodied chords, fat clean lead passages and jazz tones. Clean2: It has the glassy edge of a classic British sound for those bright, jangly tones. POWER AMPLIFIER Powered by four EL34 virtual tubes with presence, volume and power switch in class AB push-pull configuration. DIGITAL DELAY FILTER make the delay Lo-Fi and OFFSET create a time offset in left/right delay sections ANALOG MODULATIONS select Chorus or Tremolo modulation AMBIENT REVERB Hall reverb algorithm FILTERS CLEANER Low and High cut filters PRE and POST amplifier ANALOG NOISE GATE tuned for guitar and bass STUDIO COMPRESSOR keep your dynamics in check, whether just thickening the sound or keeping levels consistent Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect. Legal Disclaimer: JMP1 is a registered trademark of Marshall Amplification PLC. Nembrini Audio JMP Pro was developed by Nembrini Audio SRL based on its own modelling techniques. Marshall Amplification PLC has not endorsed nor sponsored the Nembrini Audio JMP Pro in any manner, nor licensed any intellectual property for use in this product.

Screenshots

TestTone1 screens
JMP Pro2 screens

Verdict

The call

The clearest difference is price: TestTone at $1.99 against JMP Pro's $19.99. TestTone also leads on update cadence (every 5 months vs every 50 months). On ads, in-app purchases, device support and iOS requirement 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

TestTone costs $1.99 and JMP Pro $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

TestTone ships an update every 5 months, JMP Pro every 50 months. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

Scorecard2 real differences · 8 level
TestTone versus JMP Pro: the parameters behind the verdict, then further details
ParameterTestToneJMP Pro
Price$1.99 — better$19.99
Rating—5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 5 months — betterEvery 50 months
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615 — better
Further details — not scored
Size8 MB30 MB
Age rating4+4+
DeveloperHTLabNembrini Audio

In-app purchases

None

TestTone

No in-app purchases

None

JMP Pro

No in-app purchases

Questions

Is TestTone free?
TestTone costs $1.99, with no in-app purchases.
Is JMP Pro free?
JMP Pro costs $19.99, with no in-app purchases.
Do TestTone or JMP Pro have ads?
Neither TestTone nor JMP Pro shows ads.
Which is updated more often, TestTone or JMP Pro?
TestTone ships an update every 5 months, and JMP Pro every 50 months. Most recently, TestTone was updated on October 10, 2026 and JMP Pro on October 15, 2026.

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