Comparison

OX | Amp Top Box vs BOSS Effect Loader

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

Head to head
About

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.

Highlights
  • Full Rig control via Wi-Fi
  • 120+ Rig presets
  • 22 classic speaker cabinets
  • Boutique mic combinations
  • Studio amp tone effects
  • Custom preset storage
Read full description

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

About

BOSS Effect Loader

This application allows users to load effects into the PX-1 Plugout FX device. It offers a selection of free effects and the option to purchase additional model passes within the app. An internet connection and Roland Account are required for full functionality.

Highlights
  • Load effects into PX-1 Plugout FX
  • 16 free effect models included
  • Purchase additional model passes
  • Bluetooth or USB connection
  • Requires Roland Account
Features
Read full description

● BOSS EFFECT LOADER is an app for loading effects into the PX-1 Plugout FX. * Need an internet connection and a registered Roland Account are required to use the BOSS EFFECT LOADER. ● The following 16 models are available for free use: OD-1/SP-1/PH-1/SG-/CS-1/TW-1/SD-1/DS-1/CE-2/OC-2/BF-2/PN-2/DD-2/DF-2 ● Additional Model Passes can be purchased within the app. ● Connect the BOSS PX-1 Plugout FX and your iPhone/iPad via Bluetooth® (*1) or USB cable (*2) to use this app. *1 Set up the Bluetooth connection in the Connection Window displayed after the app is launched. *2 When connecting to an iPhone/iPad equipped with a USB Lightning port, you will need Apple's genuine “Lightning to USB 3 Camera Adapter.”

Screenshots

BOSS Effect Loader2 screens

Verdict

The call

The clearest difference is in-app purchases: OX | Amp Top Box at none against BOSS Effect Loader's 8. OX | Amp Top Box also leads on iOS requirement (12.0 vs 15.6). BOSS Effect Loader's advantage is ads (none vs shown) and device support (3 vs 1). On price, rating, review sentiment and ratings volume 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. BOSS Effect Loader sells 8 one-off in-app purchases. OX | Amp Top Box asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OX | Amp Top Box holds the better App Store score, 3.7 against 3.5. Both are backed by a comparable volume of ratings — 22 and 8 respectively. Written reviews complicate that: 38% of OX | Amp Top Box's written reviews are positive against 42% of BOSS Effect Loader's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 5 months. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
OX | Amp Top Box versus BOSS Effect Loader: the parameters behind the verdict, then further details
ParameterOX | Amp Top BoxBOSS Effect Loader
PriceFreeFree
Rating3.7 (22 ratings) — better3.5 (8 ratings)
Positive reviews37.5% of reviews41.7% of reviews — better
Number of ratings22 — better8
Update frequencyEvery 5 monthsEvery 5 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS12.0 — better15.6
Further details — not scored
Size71 MB3 MB
Age rating4+4+
DeveloperUniversal AudioRoland Corporation

Customer experience

OX | Amp Top Box

All ratings20 ratings
Positive70.0%
Neutral0.0%
Negative30.0%
Written reviews16 reviews
Positive37.5%
Neutral0.0%
Negative62.5%

BOSS Effect Loader

All ratings8 ratings
Positive62.5%
Neutral0.0%
Negative37.5%
Written reviews12 reviews
Positive41.7%
Neutral33.3%
Negative25.0%

In-app purchases

None

OX | Amp Top Box

No in-app purchases

8 purchases

BOSS Effect Loader

One-time8
  • PW-2 Power Driver$9.99
  • XT-2 Xtortion$9.99
  • CS-2 Compression Sustainer$9.99
Show 5 more
  • DM-2 Delay$9.99
  • DC-2 Dimension C$9.99
  • OD-2 TURBO OverDrive$9.99
  • Bundle for PW-2/XT-2/CS-2$19.99
  • Bundle for OD-2/DC-2/DM-2$19.99

Questions

Is OX | Amp Top Box free?
OX | Amp Top Box is free to download, with no in-app purchases.
Is BOSS Effect Loader free?
BOSS Effect Loader is free to download, with in-app purchases available.
Which has better reviews, OX | Amp Top Box or BOSS Effect Loader?
OX | Amp Top Box is rated higher. OX | Amp Top Box averages 3.7 out of 5 from 22 ratings, while BOSS Effect Loader averages 3.5 from 8 ratings.
Do OX | Amp Top Box or BOSS Effect Loader have ads?
OX | Amp Top Box shows ads; BOSS Effect Loader does not.
Which is updated more often, OX | Amp Top Box or BOSS Effect Loader?
OX | Amp Top Box ships an update every 5 months, and BOSS Effect Loader every 5 months. Most recently, OX | Amp Top Box was updated on October 24, 2026 and BOSS Effect Loader on October 24, 2026.

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