AudioCalc vs Konvert
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AudioCalc
This tool provides audio-specific conversion formulas for HiFi enthusiasts, home theater buffs, and audio professionals. It includes converters for frequency, band, delay, volume, and room modes, aiding in loudspeaker positioning, EQ setup, and room acoustics. Supports both imperial and metric units.
- Frequency, period, and wavelength converter
- Parametric EQ band setup tool
- Speaker distance and delay calculator
- Amplifier power calculation
- Room mode response computation
- Imperial and metric unit support
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HiFi enthousiasts, Home Theater buffs and audio professionals alike make sure you always have those handy formulas with you. This tool offers you a collection of audio targeted conversion tools. The frequency, period and wavelength converter comes in quite handy for positioning loudspeakers. The band tool helps you setup a parametric EQ. The delay part gives you an insight when setting speaker distances and delays. The volume tool helps you determine the amplifier power required for a given set of speakers. The room modal response tool allows you to compute the room modes present in a room. This is crucial when placing a subwoofer provide correct bass response. It can also be used when designing a room to avoid dimensions that would lead to a poor modal response. AudioCalc works in both imperial and metric units. Simply swipe down to reveal the unit selection view. If you liked this tool, be sure to also check VideoCalc, the companion tool that addresses your video needs.
Konvert
This app provides a simple and intuitive way to perform unit and currency conversions. It features a clean design, supports numerous categories and units, and offers convenient features like real-time conversion and widget integration.
- Easy to use with clean design
- 24 categories and hundreds of units
- Converts as you type
- Today widget for last conversion
- 3D Touch shortcut for currency converter
- Localized in multiple languages
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Featured by Apple on 60+ countries. “Konvert is a beautifully simple unit-conversion app for iPhone” - TheNextWeb “Conversions Have Never Been Simpler With Konvert” - AppAdvice Features: • Easy to use with clean design • 24 categories and hundreds of units • You can change the order of categories • You can see your last conversion with Today widget • You can copy your last conversion with 3D Touch • 3D Touch shortcut for currency converter • Converts as you type a number • It works with our “Kalkulator” app, you can use results within these apps • iPhone 5, 8, 8plus, XS, XSMAX, XR support • Localized in Japanese, Spanish, German, Italian, Turkish Categories & Units: • Angle : ° , g, rad, turn • Area : m², ac, a, ha, cm², dm², dam², hm², inch², km², mi², mm², yard², ft² • Base : 10, 16, 2, 8 • Currency : USD, EUR, JPY, GBP, TRY, CHF, AED, ARS, AUD, AZN, BGN, BHD, BOB, BRL, CAD, CLP, CNY, COP, CUP, CZK, DKK, DZD, EGP, GEL, HKD, HRK, HUF, IDR, ILS, INR, IQD, IRR, KRW, KWD, KZT, LTL, LYD, MXN, MYR, NOK, NZD, PEN, PHP, PKR, PLN, PYG, QAR, RON, RUB, SAR, SEK, SGD, SYP, THB, TMT, TND, TTD, TWD, UAH, UYU, VEF, ZAR … • Energy : J, kWh, BTU, cal, erg, kJ, kcal • Length : m, dm, mm, inch, yard, ft, cm, km, mi, NM • Mass : kg, lb, st, oz, t, ton, LT, gr, mg, mcg • Power : W, BTUhr, BTUs, cals, kcals, kW, hp • Speed : kmh, mph, fts, m/s, knot, mach, c (speed of light) • Temperature : C, F, K, R, D • Time : hr, d, m, w, yr, ns, μs, ms, s • Volume : m³, l, ml, cm³, cu in, cu yd, cu ft, (US)gal, (UK)gal,qt, pt, cup, fl oz, tbsp, tsp, bbl(fluid), bbl(oil), bbl(dry) • Acceleration : ms², Gal, g, ins², kms², mis² • Data : B, KB, MB, GB, TB, KiB, MiB, GiB, TiB, bit, Kbit, Mbit, Gbit, Tbit • Density : grcm³, kgm³, grl, ozgal, lbcu ft, kgl • Flow Rate : ls, lmin, lhr, m³s, m³mi, m³hr, cu fts, cu ftmin, cu fthr, gals, galmin, galhr, bbl(o)d, bbl(f)d • Force : N, dyn, pdl, kp • Frequency : Hz, kHz, MHz, GHz, rpm, rps, radmin, rads • Fuel : km/l, l/100km, l/100mil, gal/100mil, imperial gal/100mil, mpg, mpeg • Illuminance : lx, lmcm², lmm², mcd, ph, ph, nx • Pressure : b, psf, psi, Pa, torr, atm • Radiation : sv, gy, jkg, m²s², rem, R/h • Torque : Nm, Ncm, Nmm, kNm, dynm, ozf in, lbf ft, lbf in • Typography : pt, px(72), px(96), px(150), px(300), mm, cm, in, twip, em, pica
Screenshots
Verdict
The clearest difference is review sentiment: Konvert at 79% against AudioCalc's 33%. Konvert also leads on rating (4.8 vs 3.0) and update cadence (monthly vs every 7 months). AudioCalc's advantage is iOS requirement (7.0 vs 26.0). 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
AudioCalc costs $2.99 and Konvert $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Konvert holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Konvert has 364 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of AudioCalc's written reviews are positive against 79% of Konvert's.
AudioCalc ships an update every 7 months, Konvert monthly. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.
| Parameter | AudioCalc | Konvert |
|---|---|---|
| Price | $2.99 | $1.99 — better |
| Rating | 3.0 (1 ratings) | 4.8 (364 ratings) — better |
| Positive reviews | 33.3% of reviews | 78.6% of reviews — better |
| Number of ratings | 1 | 364 — better |
| Update frequency | Every 7 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 7.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Nelcea | InnovationBox |
Customer experience
AudioCalc
Konvert
Bugs and requests
AudioCalc
Not enough reviews yet to summarise bugs or requests.
Konvert
Reported bugs
5 issues- Exchange rates not updating properly
- Inaccurate currency conversion rates (off by significant margins)
- Data conversion errors (KB to Bytes calculation incorrect)
- Unit arrangement feature non-functional
- Missing units in various categories despite being listed
Requested features
10 requests- Add volume/liquid conversions (ml to oz, liters, etc.)
- Expand currency list to include more world currencies
- Improve unit selection interface (tap-to-select instead of swiping)
- Add more measurement units (miles per gallon, stone weight, etc.)
- Implement different color themes or dark mode
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- Add ability to customize or hide categories
- Include decibel conversions
- Add Chinese language support
- Alphabetical ordering of units
- Custom conversion creation feature
In-app purchases
AudioCalc
No in-app purchases
Konvert
No in-app purchases









