Hivolt 103 Custom vs jAmp IR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hivolt 103 Custom
This app emulates a vintage guitar amplifier, offering two channels with shared EQ and interactive controls. It includes a full recording chain emulation and a custom noise gate. Works as a standalone app or an audio effect.
- Vintage Hiwatt DR103 emulation
- Two channels with shared EQ
- Normal and Brilliant inputs
- Channel linking for blended sound
- Recording chain emulation
- Custom noise gate circuit
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Hivolt 103 Custom Guitar Amplifier plugin is based on a vintage Hiwatt* DR103 year 1970 with original Partridge transformer and military point-to-point wiring. Hivolt 103 Custom Guitar Amplifier plugin is a 2 channels amplifier with shared EQ for both channels. It has 4 inputs, 2 for each channel (normal and brilliant). Hi inputs are DOWN and LO inputs are UP. Patching of channels works here, and you can blend for additional versatility. All amplifier parameters knobs work as EQ/drive controls basically, they are very interactive and very responsive. - Normal and Brilliant channels with independent High and Low inputs for each channel. Versatile and intuitive, perfect for bringing life out of dark pickups or taming shrill high end in bright pickups. - Link the two channels for extra punch and dynamic control of your EQ via the independent channel volumes. The Hivolt 103 Custom Guitar Amplifier includes a complete recording chain emulation and our custom design noise gate circuit. Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect Legal Disclaimer: Hiwatt DR103 is a registered trademark of Hiwatt Electronics Ltd. Hivolt 103 was developed by Nembrini Audio SRL based on its own modelling techniques. Hiwatt Electronics Ltd has not endorsed nor sponsored the Hivolt 103 in any manner, nor licensed any intellectual property for use in this product.
jAmp IR
This tool loads impulse responses for guitar and bass amp cabinet simulation. It allows mixing two impulse responses and offers fine control over filters, gain, and phase. The app includes five high-quality impulse responses.
- Impulse response loader
- Cabinet simulator for guitar and bass
- Mix two impulse responses
- High and low pass filters
- Gain control
- Phase inversion
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jAmp IR is a zero latency impulse response loader tool in AUv3 plugin format. It is designed to be a cabinet simulator for guitar and bass amps. Two impulse responses can be mixed. Furthermore there is fine level control in the form of high and low pass filters, gain control, and phase inversion. The app comes with 5 high quality impulse responses.
Screenshots
Verdict
The clearest difference is price: jAmp IR at Free against Hivolt 103 Custom's $9.99. jAmp IR also leads on update cadence (every 2 weeks vs every 56 months) and ratings volume (15 vs 4). Hivolt 103 Custom's advantage is rating (5.0 vs 4.7). 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
jAmp IR is free to download; Hivolt 103 Custom costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Hivolt 103 Custom holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 4 and 15 respectively.
Hivolt 103 Custom ships an update every 56 months, jAmp IR every 2 weeks. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.
| Parameter | Hivolt 103 Custom | jAmp IR |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 5.0 (4 ratings) — better | 4.7 (15 ratings) |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | 4 | 15 — better |
| Update frequency | Every 56 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15 | 14.0 — better |
| Further details — not scored | ||
| Size | 42 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Nembrini Audio | Jan Maes |
Customer experience
Hivolt 103 Custom
jAmp IR
In-app purchases
Hivolt 103 Custom
No in-app purchases
jAmp IR
No in-app purchases









