Comparison

連絡先QRコード作成 vs MIDI Opener

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

Head to head
About

連絡先QRコード作成

Easily create QR codes from your iPhone contacts. Share contact information instantly by displaying the QR code, compatible with major Japanese carriers. Also functions as a QR code reader and can resize photos for mobile email.

Highlights
  • Create QR codes from iPhone contacts
  • Supports 3 major Japanese carriers
  • Selectable contact information for QR code
  • QR code scanning functionality
  • Photo resizing for mobile email
Features
Read full description

「連絡先QRコード作成」は、iPhoneの連絡先からQRコードを作成できるアプリです。 連絡先に登録されている情報を、ドコモ、au、ソフトバンクの3キャリアに対応したQRコードに変換して表示します。画面を見せるだけで、相手の携帯電話に連絡先を渡せます。 QRコードの読み取りにも対応しているので、受け取る側としても使えます。 主な機能: ■連絡先のQRコード作成 連絡先の情報をQRコード化し、画面に表示します。 ドコモ、au、ソフトバンクの3キャリアの形式に対応しています。 相手に伝える必要のない情報は、チェックを外すことで自由に選択できます。 ■QRコードの読み取り カメラをQRコードにかざすだけで、自動検出します。 ■携帯向け写真メールの送信 他の携帯で開けるサイズに自動的にリサイズして、写真を送信する機能です。

About

MIDI Opener

This app is a powerful and modern MIDI player designed for musicians, learners, and creators. It offers visual playback, tempo and key control, and advanced track management. Import custom soundbanks and enjoy features like synchronized lyrics and a 3D visualizer.

Highlights
  • Visual MIDI playback
  • Tempo and key control
  • Advanced track controls
  • 128 General MIDI instruments
  • Built-in effects
  • Custom soundbanks
  • Synchronized lyrics
  • 3D visualizer
Features
Read full description

MIDI Opener – Play, Practice & Export MIDI Files Open any MIDI file and take full control of your music. MIDI Opener is a fast, precise MIDI player built for musicians who want to practice smarter, isolate parts, customize arrangements, route playback to external gear, export their changes, and deeply explore songs without the complexity of a DAW. WHY MIDI OPENER • Instantly open and play standard MIDI files (.mid, .midi) • Ultra-responsive playback with zero clutter • Built for practice, learning, live performance, and musical exploration • Completely ad-free POWERFUL PLAYBACK CONTROL • Change tempo in real time (slow down or speed up) • Transpose key instantly to match your instrument • Mute, solo, and adjust volume for each track • Swap instruments using all 128 General MIDI sounds • Import custom SoundFont (.sf2) and DLS soundbanks • Apply reverb, delay, distortion, and EQ effects EXPORT YOUR CHANGES • Export audio as MP3, M4A, or WAV • Export modified MIDI files with your changes • Save customized practice mixes and arrangements • Perfect for backing tracks, sharing, and rehearsal prep PRACTICE WITH PRECISION • Loop any section with A–B looping • Isolate difficult passages and repeat them • Break down complex songs into manageable parts • Save and instantly restore full practice setups with Snapshots Perfect for pianists, guitarists, producers, singers, music directors, and students. MIDI OUT & EXTERNAL DEVICES • Send MIDI playback to external keyboards, synths, drum machines, and sound modules • Connect over USB, Bluetooth, or Wi-Fi • Compatible with Logic Pro, Ableton Live, GarageBand, and CoreMIDI apps • Use premium external instrument sounds and studio hardware SING AND PRACTICE • View embedded lyrics when available • Real-time word highlighting synced to playback • Great for karaoke and vocal practice SEE YOUR MUSIC • Clean, readable note timeline • Beautiful full screen Focus Mode with ambient visuals, auto hiding controls, and optional synchronized lyrics • Track based visual layout • Retro 3D visualizer • Multiple visual themes ORGANIZE YOUR MIDI LIBRARY • Import from Files, AirDrop, Mail, and other apps • Create playlists • Queue songs for continuous playback UPGRADE OPTIONS Free — The Player & Customizer Open and play MIDI files with powerful built-in customization tools. Includes instrument swapping with all 128 General MIDI sounds, custom SoundFont and DLS support, synchronized lyrics, audio effects, song section looping, visual themes, saved mixes with Snapshots, playlists, queue support, and a complete MIDI song library experience—all in a fast, focused, ad-free player. Practice Pack — The Musician’s Upgrade Unlock advanced practice and arrangement tools including real-time tempo control, key transposition, per-track mute, solo, and volume controls, plus MP3 audio and MIDI export for creating custom practice mixes, backing tracks, and arrangements. MIDI Out — The Producer’s Upgrade Route MIDI playback to external keyboards, synths, drum machines, DAWs, and professional music hardware over USB, Bluetooth, or Wi-Fi using CoreMIDI. All Access — Everything, Once Get the complete MIDI Opener experience with every upgrade included, plus discounted upgrade pricing if you already own another product. FAST. FOCUSED. NO DISTRACTIONS. Made for musicians who want control—not complexity.

Screenshots

連絡先QRコード作成2 screens
MIDI Opener4 screens

Verdict

The call

The clearest difference is rating: MIDI Opener at 3.9 against 連絡先QRコード作成's 3.0. MIDI Opener also leads on update cadence (every 10 days vs every 2 months) and ratings volume (85 vs 2). 連絡先QRコード作成's advantage is in-app purchases (none vs 13) and iOS requirement (15.0 vs 17.6). On price, review sentiment, 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

Both are free to download. MIDI Opener sells 13 one-off in-app purchases. 連絡先QRコード作成 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

MIDI Opener holds the better App Store score, 3.9 against 3.0. That said, the two scores are not equally well evidenced: MIDI Opener has 85 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 70% of 連絡先QRコード作成's written reviews are positive against 64% of MIDI Opener's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

連絡先QRコード作成 ships an update every 2 months, MIDI Opener every 10 days. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
連絡先QRコード作成 versus MIDI Opener: the parameters behind the verdict, then further details
Parameter連絡先QRコード作成MIDI Opener
PriceFreeFree
Rating3.0 (2 ratings)3.9 (85 ratings) — better
Positive reviews70.0% of reviews — better64.5% of reviews
Number of ratings285 — better
Update frequencyEvery 2 monthsEvery 10 days — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size9 MB334 MB
Age rating4+4+
DeveloperTakashi WadaMartianRover, LLC

Customer experience

連絡先QRコード作成

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews20 reviews
Positive70.0%
Neutral0.0%
Negative30.0%

MIDI Opener

All ratings81 ratings
Positive72.8%
Neutral8.6%
Negative18.5%
Written reviews76 reviews
Positive64.5%
Neutral11.8%
Negative23.7%

Bugs and requests

連絡先QRコード作成

Not enough reviews yet to summarise bugs or requests.

MIDI Opener

Reported bugs

15 issues
  • Sustained notes are treated as staccato notes.
  • Cuts off the beginning of the song.
  • Kicked out of the app when clicking on another SoundFont.
  • Crashes when changing SoundFonts (iOS 26).
  • Bass drum is too quiet for metal music.
Show 10 more
  • Changing key option breaks songs.
  • App crashes on startup.
  • Randomly playing a single track only.
  • Skipping individual notes when too many are playing.
  • New update not working, won't play audio or understand certain instruments.
  • Google Drive method does not work.
  • Download button does nothing.
  • Skips a lot of notes.
  • No sound, plays silence.
  • Scrolling bar with no sound.

Requested features

18 requests
  • Adjust individual track volumes
  • Zoom in/out
  • Select region to play
  • Export features (WAV, MP3, FLAC)
  • Playlist functionality
Show 13 more
  • Library structure with nested folders
  • AUV3 plug-in support
  • IAA with audio hosts
  • Switchable color schemes
  • Spectrum editor/video export
  • Save MIDI soundfiles as MP3
  • More SoundBanks
  • Tempo control
  • Transpose option
  • Custom SoundFont support
  • Local storage/in-app folder
  • Background play
  • Option to play once (no loop)

In-app purchases

None

連絡先QRコード作成

No in-app purchases

13 purchases

MIDI Opener

One-time13
  • Tip$0.99
  • Full Upgrade Discount$0.99
  • Remove Ads$1.99
Show 10 more
  • Change Tempo$1.99
  • Change Tempo and Key$1.99
  • All Access Upgrade$2.99
  • Track Controls$2.99
  • Super Tip$4.99
  • MIDI Out$4.99
  • Practice Pack$4.99
  • Full Upgrade$4.99
  • Premium Upgrade$4.99
  • All Access$7.99

Questions

Is 連絡先QRコード作成 free?
連絡先QRコード作成 is free to download, with no in-app purchases.
Is MIDI Opener free?
MIDI Opener is free to download, with in-app purchases available.
Which has better reviews, 連絡先QRコード作成 or MIDI Opener?
MIDI Opener is rated higher. 連絡先QRコード作成 averages 3.0 out of 5 from 2 ratings, while MIDI Opener averages 3.9 from 85 ratings.
Do 連絡先QRコード作成 or MIDI Opener have ads?
Both 連絡先QRコード作成 and MIDI Opener show ads.
Which is updated more often, 連絡先QRコード作成 or MIDI Opener?
連絡先QRコード作成 ships an update every 2 months, and MIDI Opener every 10 days. Most recently, 連絡先QRコード作成 was updated on October 16, 2026 and MIDI Opener on October 15, 2026.

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