TestTone vs Ampz
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TestTone
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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.
Ampz
This app offers ultra-low latency guitar amp modeling on iOS, functioning as a standalone app or an AUv3 plugin. It supports custom neural network models and includes a comprehensive effects chain, preset system, and practice tools.
- Native NAM processing
- Ultra-low latency
- 10-slot effects chain
- 100-slot preset system
- IR loader
- Chromatic tuner
- MIDI control
- Drum machine and looper
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Real amp tone in your pocket. Ampz runs Neural Amp Modeler A2 captures natively on iPhone and iPad, so the same .nam models guitarists use on desktop sound just as good on iOS. Plug in, pick an amp from thousands on Tone3000, and play through a full pedalboard with ultra-low latency. Use it on its own, no DAW required, or load it as an AUv3 plug-in in your favorite Audio Unit host to record and mix through your rig. KEY FEATURES • Native NAM Processing — Runs WaveNet and LSTM .nam models at full fidelity using a C++ inference engine optimized for Apple silicon • Ultra-Low Latency — 64-sample buffers at 48kHz through Core Audio. Under 2.5ms total roundtrip • 16-Slot Effects Chain — Reverb, delay, chorus, compressor, EQ, noise gate, IR loader, and more • Flexible Routing • 8 Scenes Per Preset • 100-Slot Preset System — 100 user slots • Tone3000 Integration — Browse, search, and download NAM models and IRs directly in the app • Low-Latency Pitch Shifter: Drop tuning, virtual capo and harmonies. Includes a gritty Analog Octave mode. • IR Loader — Load third-party impulse responses for cabinet simulation • Chromatic Tuner — Built-in, always accessible • MIDI Control — Map any parameter to MIDI CC, program change support • Drum Machine — Built-in patterns for practice and jamming • Looper — Record, overdub, and playback loops • Multi-Channel Support — Works with USB and Thunderbolt audio interfaces • AUv3 effect plug-in Ampz is a one-time purchase. No subscriptions. No in-app purchases. Everything is included.
Screenshots
Verdict
The clearest difference is price: TestTone at $1.99 against Ampz's $9.99. TestTone also leads on iOS requirement (15.6 vs 18.0). Ampz's advantage is update cadence (weekly vs every 5 months). On ads, in-app purchases and device support 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
TestTone costs $1.99 and Ampz $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TestTone ships an update every 5 months, Ampz weekly. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.
| Parameter | TestTone | Ampz |
|---|---|---|
| Price | $1.99 — better | $9.99 |
| Rating | — | 4.5 (4 ratings) — better |
| Positive reviews | — | 85.7% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 5 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 8 MB | 59 MB |
| Age rating | 4+ | +4 |
| Developer | HTLab | LNH Enterprises LLC |
In-app purchases
TestTone
No in-app purchases
Ampz
No in-app purchases








