Comparison

Who Called Me vs Konvert

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

Head to head
About

Who Called Me

Identify unknown callers by searching phone numbers. This app uses a comprehensive database, supplemented by social media and geo-data, to provide real results. Keep track of your search history directly within the application.

Highlights
  • Identify unknown callers
  • Comprehensive phone number database
  • Social media and geo-data integration
  • Search history tracking
  • Copy and paste number search
Features
Read full description

Have you ever missed a call from a number you don't recognize, and want to know who called? Now you can find out, with Who Called Me. All new version 2.0! Rewritten from the ground up using a comprehensive and up to date phone number database. No more crowdsourcing data - you'll always get real results from the phone company, supplemented with social media and geo-data when available. Copy and paste from the phone app for quick results. Your search history is kept in app so you'll always know who called. Now you can know who's calling you - with Who Called Me. The app download includes credits for 4 number searches and supports US phone numbers.

About

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.

Highlights
  • 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
Features
Read full description

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

Who Called Me2 screens
Konvert4 screens

Verdict

The call

The clearest difference is review sentiment: Konvert at 79% against Who Called Me's 2%. Konvert also leads on rating (4.8 vs 1.3) and in-app purchases (none vs 1). Who Called Me's advantage is price ($0.99 vs $1.99) and iOS requirement (7.0 vs 26.0). On ads 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

CostPrice · In-app purchases · Ads · Monetization

Who Called Me costs $0.99 and Konvert $1.99 up front. Who Called Me sells 1 one-off in-app purchase. Konvert asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Konvert holds the better App Store score, 4.8 against 1.3. That said, the two scores are not equally well evidenced: Konvert has 364 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 2% of Who Called Me's written reviews are positive against 79% of Konvert's.

UpkeepUpdate frequency

Who Called Me ships an update every 33 months, Konvert monthly. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

Scorecard8 real differences · 2 level
Who Called Me versus Konvert: the parameters behind the verdict, then further details
ParameterWho Called MeKonvert
Price$0.99 — better$1.99
Rating1.3 (12 ratings)4.8 (364 ratings) — better
Positive reviews1.7% of reviews78.6% of reviews — better
Number of ratings12364 — better
Update frequencyEvery 33 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPod — betteriPhone
Requires iOS7.0 — better26.0
Further details — not scored
Size3 MB2 MB
Age rating4+4+
DeveloperLTS Inc.InnovationBox

Customer experience

Who Called Me

All ratings12 ratings
Positive8.3%
Neutral0.0%
Negative91.7%
Written reviews58 reviews
Positive1.7%
Neutral1.7%
Negative96.6%

Konvert

All ratings364 ratings
Positive96.7%
Neutral2.2%
Negative1.1%
Written reviews168 reviews
Positive78.6%
Neutral11.3%
Negative10.1%

User reviews

Who Called Me

From 12 App Store ratings

Room to improve

  • 💸 Misleading pricing/hidden charges
  • 🚫 Does not work for UK numbers
  • 🤷 No information provided
  • ❌ Useless/worthless app
  • 💰 Waste of money

Konvert

From 364 App Store ratings

What we love

  • 🎨 Beautiful, clean, and intuitive user interface design
  • ⚡ Fast and easy to use for quick conversions
  • 📊 Comprehensive range of unit conversions available
  • ✨ Smooth animations and polished visual presentation
  • 🔄 Works offline for currency and unit conversions

Room to improve

  • 💱 Exchange rates not updating or frequently inaccurate
  • 🐢 Cumbersome unit selection process (swiping through tiny windows)
  • 📉 Lack of developer support and long periods without updates
  • ❌ Missing common conversion categories (volume/liquid conversions)
  • 🔢 Limited currency options (only ~10 out of 150+ worldwide currencies)

Bugs and requests

Who Called Me

Reported bugs

8 issues
  • App does not work
  • Search found nothing
  • Numbers come up Unknown
  • Charged for searches
  • App crashes constantly
Show 3 more
  • App locks up and shuts down
  • Does not provide claimed information
  • Signed up for additional services

Requested features

5 requests
  • Support for UK numbers
  • Clearer pricing upfront
  • Tutorial or help section
  • Information on who called from 800 numbers
  • Previous functionality restored

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
Show 5 more
  • 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

1 purchases

Who Called Me

One-time1
  • 4-credit search pack$0.99
None

Konvert

No in-app purchases

Questions

Is Who Called Me free?
Who Called Me costs $0.99, and also offers in-app purchases.
Is Konvert free?
Konvert costs $1.99, with no in-app purchases.
Which has better reviews, Who Called Me or Konvert?
Konvert is rated higher. Who Called Me averages 1.3 out of 5 from 12 ratings, while Konvert averages 4.8 from 364 ratings.
Do Who Called Me or Konvert have ads?
Neither Who Called Me nor Konvert shows ads.
Which is updated more often, Who Called Me or Konvert?
Who Called Me ships an update every 33 months, and Konvert monthly. Most recently, Who Called Me was updated on October 24, 2026 and Konvert on October 23, 2026.

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