OX | Amp Top Box vs Decibel Display
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OX | Amp Top Box
Control your tube amp's legendary tone from anywhere with this companion app. Access a virtual studio of speaker cabinets, microphones, and effects to craft album-quality guitar sounds. Store your custom presets directly to your hardware.
- Full Rig control via Wi-Fi
- 120+ Rig presets
- 22 classic speaker cabinets
- Boutique mic combinations
- Studio amp tone effects
- Custom preset storage
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Legendary Album Tone from your Tube Amp — Anywhere, at Any Volume. This is the companion application for OX Amp Top Box by Universal Audio. Install the Rig Control app on your iPad or computer, then pair over Wi-Fi to your OX hardware and tap into a full virtual studio of speaker cabinets, microphones, and effects for getting legendary amp tones. Features • Full control of OX Amp Top Box Rigs via Wi-Fi on iPad, macOS, and Windows • Access 120+ carefully-crafted Rig presets for instant album-quality guitar tones • Choose from 22 classic speaker cabinets with vintage, NOS, and modern speakers • Choose from 7 boutique close mic and 6 room mic combinations • Perfect your studio amp tones with EQ, Compression, Delay, and Plate Reverb • Store your custom presets to OX’s RIG knob Requirements • OX Amp Top Box Hardware • Internet connection via Wi-Fi for OX hardware registration • iPad with iOS 12 or higher
Decibel Display
This companion app displays audio metering data from its desktop counterpart on your smartphone or tablet. Design custom multi-meter presets with various meter types, colors, and shapes for real-time audio analysis.
- Real-time audio metering
- Customizable meter presets
- VU Meter, LUFS, RMS
- Spectrum Analyzer
- Phase-scope
- Modular design
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Decibel Display app is only a viewer, it works with Decibel Desktop which is an audio Plug-in (VST3, AAX, AU) and standalone app (Mac, Windows) that can be broadcast to any smartphone or tablet device using this app. It is a modular multi-meter on which you can design the preset you want including color, size, shape, choosing between several VU Meter, LUFS Meters, RMS Meter, Spectrum Analyser, Phase-scope and so on.
Screenshots
Verdict
The clearest difference is rating: Decibel Display at 4.3 against OX | Amp Top Box's 3.7. Decibel Display also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 5 months). On price, review sentiment, ratings volume 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.
Decibel Display holds the better App Store score, 4.3 against 3.7. Both are backed by a comparable volume of ratings — 22 and 11 respectively. Written reviews point the same way: 38% of OX | Amp Top Box's written reviews are positive against 40% of Decibel Display's.
OX | Amp Top Box ships an update every 5 months, Decibel Display every 5 weeks. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.
| Parameter | OX | Amp Top Box | Decibel Display |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (22 ratings) | 4.3 (11 ratings) — better |
| Positive reviews | 37.5% of reviews | 40.0% of reviews — better |
| Number of ratings | 22 — better | 11 |
| Update frequency | Every 5 months | Every 5 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 71 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Universal Audio | Process Audio |
Customer experience
OX | Amp Top Box
Decibel Display
In-app purchases
OX | Amp Top Box
No in-app purchases
Decibel Display
No in-app purchases
Questions
Is OX | Amp Top Box free?
Is Decibel Display free?
Which has better reviews, OX | Amp Top Box or Decibel Display?
Do OX | Amp Top Box or Decibel Display have ads?
Which is updated more often, OX | Amp Top Box or Decibel Display?
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