ずんだボイス2 vs Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ずんだボイス2
This app allows users to generate lip-sync videos using custom characters and voice. It offers advanced customization for voice, speed, and tone, with both online and offline processing options. Users can save, edit, and share their creations.
- Lip-sync video generation
- Custom character support
- Advanced voice customization
- Online and offline processing
- Speech synthesis
- Audio saving and sharing
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ずんだボイスは、VoiceVoxエンジンを使用した高品質なテキスト読み上げアプリです。 【主な機能】 ・テキストを入力するだけで、ずんだもんの声で読み上げ ・完全オフライン対応 - インターネット接続不要 ・音声ファイルの保存・共有機能 ・読み上げ履歴の管理 ・ダークモード対応 【キャラクター】 ずんだもんをはじめ、VoiceVoxの様々なキャラクターの音声を利用できます。追加の音声モデル(VVMファイル)をインポートすることで、さらに多くのキャラクターを追加できます。 【注意事項】 本アプリはVoiceVoxエンジンを使用しています。音声合成にはVoiceVoxのライセンスが適用されます。
Calc
This app adds a fun, interactive calculator experience with cute character reactions and customizable designs. It also features a unique 'Performance Mode' for playing music and hidden 'SP Answer Actions' for special character responses.
- Cute character reactions with button presses
- Customizable calculator themes
- Performance Mode for music playback
- Hidden SP Answer Actions
- Paid character DLCs available
- Voice lines for each character
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A little more joy in your calculations, every day. Desktop Mate now has a sister app! Calculator - Desktop Mate Widgets is a digital calculator you can use with your favorite characters — and the first release in the new Desktop Mate Widgets series. ■ Enjoy Cute Character Reactions Every time you press a calculator button, the character will speak that number and strike a pose. Press "=" to get the answer — though sometimes they might struggle a little to figure it out! Pet or poke the character's head for special reactions too. Enjoy your favorite character's movements and expressions as you calculate. ■ Customize with Character-Themed Designs Swap out the calculator buttons and background to match your character's style. Each character comes with multiple design options, so you can mix and match to suit your mood or the moment. ■ Performance Mode: Play Music on Your Calculator! Tap the music note button to switch from calculator mode to Performance Mode. The calculator keys function like piano keys, and the character will sing along to whatever you press. Hold "+" or "-" to shift notes by a semitone, and multi-key presses are supported too. With a little practice, you might be able to pull off a real performance! Share your session on social media and enjoy it with everyone. ■ SP Answer Actions: Find the Hidden Numbers Certain calculation results trigger special character reactions. From a triple "777" to fun number combinations, each character also has their own unique numbers that set off a special response. See how many hidden reactions you can find! ■ Ready to Use Right Away: Aieru-tan Launch the app and you're ready to go with Aieru-tan, the official mascot character of infiniteloop. Aieru-tan is a 16-year-old high school student who works part-time at infiniteloop. She loves programming and gaming, and her occasionally sharp tongue is all part of her charm. Since her debut in 2012, she has appeared in Desktop Mate and many other projects as a beloved face of infiniteloop. ■ More Character DLCs for a More Personal Experience This app also offers paid additional character DLC. The "Hatsune Miku DLC" will be available at launch, with more characters to be added over time in step with the Desktop Mate series lineup. Each DLC features newly recorded voice lines tailored to each character, so you can enjoy your favorite character's voice and reactions every time you use the calculator. More characters will be added over time, in line with the Desktop Mate series lineup. And this is just the beginning — more Desktop Mate Widgets apps are on the way. Stay tuned! Note: When using additional character DLC, please also review the guidelines set by each character's rights holder.
Screenshots
Verdict
The clearest difference is rating: ずんだボイス2 at 4.8 against Calc's 4.2. Calc's advantage is ads (none vs shown) and update cadence (weekly vs every 2 weeks). On price, review sentiment, in-app purchases and monetization model 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
Both are free to download. ずんだボイス2 sells 3 in-app purchases, starting at $0.99 per month and Calc sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
ずんだボイス2 holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 13 and 42 respectively. Written reviews complicate that: 73% of ずんだボイス2's written reviews are positive against 78% of Calc's, so the app with the better star average is not the one people write more warmly about.
ずんだボイス2 ships an update every 2 weeks, Calc weekly. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.
| Parameter | ずんだボイス2 | Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (13 ratings) — better | 4.2 (42 ratings) |
| Positive reviews | 73.3% of reviews | 78.1% of reviews — better |
| Number of ratings | 13 | 42 — better |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 262 MB | 156 MB |
| Age rating | 4+ | 4+ |
| Developer | Toraichi Igarashi | インフィニットループ |
Customer experience
ずんだボイス2
Calc
In-app purchases
ずんだボイス2
- subscription$0.991 Month
- 年額$9.991 Year
- One-time Puechase$11.99
Calc
- Zundamon$2.99
- Koharu Rikka$2.99
- Natsuki Karin$2.99
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- Hanakuma Chifuyu$2.99
- Additional Character MEIKO$2.99
- Additional Character KAITO$2.99
- Additional Character Kagamine Rin$2.99
- Additional Character Kagamine Len$2.99
- Additional Character Megurine Luka$2.99
- Additional Character Hatsune Miku$2.99









