Comparison

ワイヤレスCO2モニター vs Kowairo Voice

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

Head to head
About

ワイヤレスCO2モニター

Features
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あなたのお部屋のCO2(二酸化炭素)濃度はどれくらいかご存知ですか? CO2濃度は人の集中力や健康などに影響を及ぼします。CO2濃度が上がったらしっかり換気し リフレッシュしてください。 専門家などは部屋のCO2濃度は1,000ppm以下とすることを推奨しています。 *注)本アプリに対応したセンサーデバイスが無いと動作しません。 【主な機能】 1.正確なCO2濃度を測定および記録することが可能です。(データロギング機能) 2.測定間隔は3秒、10秒、30秒、1分、5分、10分、30分、1時間から選択できます。 3.最大で12個のセンサーによる同時観測が可能です。 4.内蔵電池だけで最長で1年以上のデータロギングが可能です。 5.3種類の校正機能があるので、長期間ご使用になれます。 【主な用途】 1.人が居住する場所の換気状態の「見える化」 2.大人数が限られた空間に集まる室内の換気モニタリング(教室、バス、映画館等) 3.CO2ガスやCO2消火器等の漏れのモニタリング 4.ビニールハウスや植物工場におけるCO2濃度管理 5.住宅・ビル用換気システムの制御等

About

Kowairo Voice

Features
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Kowairo Voice is a completely offline Japanese text-to-speech app powered by Irodori-TTS v3. It runs entirely on-device — no internet connection required after the initial model download. FULLY OFFLINE & PRIVATE All processing happens on your device. Your text and generated audio never leave your phone. No data collection, no accounts needed. VOICE DESIGN Describe the voice you want in natural language — "calm female voice, cheerful" or "energetic young male voice" — and the AI generates speech matching your description. VOICE CLONING (DUAL MODE) Upload a reference audio recording to clone the voice. Combine with text descriptions for even more control. ORGANIZED LIBRARY Browse your generated clips by date, search by text content, and mark favorites for quick access. PLAYLISTS Group your audio clips into playlists. Play them in order, shuffled, or on repeat. POWERED BY IRODORI-TTS V3 Built on the latest Irodori-TTS v3 (VoiceDesign) model, fine-tuned for high-quality Japanese speech synthesis with expressive control. Perfect for content creators, language learners, accessibility needs, and anyone who wants to generate natural Japanese speech on their own terms.

Screenshots

ワイヤレスCO2モニター1 screens
Kowairo Voice2 screens

Verdict

The call

The clearest difference is update cadence: Kowairo Voice at every 2 weeks against ワイヤレスCO2モニター's every 11 months. ワイヤレスCO2モニター's advantage is iOS requirement (8.0 vs 18.0). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ワイヤレスCO2モニター ships an update every 11 months, Kowairo Voice every 2 weeks. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 4 level
ワイヤレスCO2モニター versus Kowairo Voice: the parameters behind the verdict, then further details
ParameterワイヤレスCO2モニターKowairo Voice
PriceFreeFree
Update frequencyEvery 11 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPod — betteriPhone
Requires iOS8.0 — better18.0
Further details — not scored
Size4 MB35 MB
Age rating4+4+
DeveloperStep One LimitedTAKAYOSHI YOSHIKAWA

In-app purchases

None

ワイヤレスCO2モニター

No in-app purchases

None

Kowairo Voice

No in-app purchases

Questions

Is ワイヤレスCO2モニター free?
ワイヤレスCO2モニター is free to download, with no in-app purchases.
Is Kowairo Voice free?
Kowairo Voice is free to download, with no in-app purchases.
Do ワイヤレスCO2モニター or Kowairo Voice have ads?
Neither ワイヤレスCO2モニター nor Kowairo Voice shows ads.
Which is updated more often, ワイヤレスCO2モニター or Kowairo Voice?
ワイヤレスCO2モニター ships an update every 11 months, and Kowairo Voice every 2 weeks. Most recently, ワイヤレスCO2モニター was updated on October 10, 2026 and Kowairo Voice on October 16, 2026.

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