UDTalk vs KoeSapo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UDTalk
Facilitates universal communication by translating speech and handwriting into text across devices. Ideal for bridging language barriers and supporting interactions with deaf individuals. Connects via Wi-Fi or internet for seamless real-time translation.
- Speech recognition translation
- Handwriting recognition translation
- Automatic language translation
- Wi-Fi and internet connectivity
- Cross-device communication
- Supports deaf communication
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UD Talk can deliver to support universal communication in your life. Especially, it is for useful between deaf people and us or other languages, and so on. You can connect other devices using wifi or internet. You can send your speech to other devices using speech recognition, hand writing. Languages is translated automatically (to your native language). For example, if you want to see Japanese content, you can use it. About Auto renewal subscriptions - Items Compact Plan 1 month (It's renewed automatically.): 980 yen 1 week (It's renewed automatically.): 480 yen + 3 days free trial It'll be paid in the Apple ID you use. - About an automatic renewal and accounting. Use will be "automatic continuation renewal". Use is renewed automatically within 24 hours which end and charged for the iTunes account you use. - About a stop of confirmation of setting and an automatic renewal. It's possible to be to turn off an automatic renewal and suspend an automatic renewal of a license from customer's account setting screen before more than 24 hours of a license period end. It's possible to change an automatic renewal from a "Settings > iTunes &App Store > Tap your Apple ID area > View Apple ID > Tap subscriptions "manage". - About cancellation. It isn't possible to do change in the period and cancellation during "Compact Plan" use. - Private policy http://udtalk.jp/privacy/ - Terms of use https://udtalk.jp/license_of_app/ - About subscriptions http://udtalk.jp/compact/
KoeSapo
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KoeSapo helps you keep a conversation going when hearing is hard: the other person’s English speech appears as text while they speak, and what you type is spoken aloud in an English voice. The app’s screens are available in English, Japanese, Spanish, Portuguese, Korean, and Traditional Chinese, matching your device language. You choose the listening and voice language in Settings, from the languages your iPhone supports. Made for the counter, the table, the reception desk, and the people at home. Open the app, tap Start a conversation, and you’re ready. FREE TO TALK • See the other person’s voice as large text, as they speak. The top of the screen shows when KoeSapo is listening and how long the conversation has run. • Type what you want to say and have KoeSapo speak it for you. If a line doesn’t come through as text, tap Type your reply and answer right away. • The Card to show others opens in full screen and lets the other person know that you have trouble hearing and would like them to speak slowly and clearly. • Keep your go-to lines in the Phrasebook, organized in categories and subcategories, with an icon you choose for each category. During a conversation, pick a phrase and it goes into the text field. • Finished conversations are kept in Conversation history, ready to read again. • Change the text size, and the voice pitch and speed, in Settings. PAID FEATURES (SUBSCRIPTION) These six features need a KoeSapo Plus subscription: • Show to them: your latest spoken line in big, full-screen text, flipped to read from across the table, with the screen kept awake. • Quick phrases: open your Phrasebook from the bar above the text field and speak a phrase right away. • Search and sort phrases in your Phrasebook • Search conversation history by word or date • Export conversations as text or PDF • Share as a picture: turn the bubbles you pick into one picture to share. The subscription auto-renews. See the subscription screen in the app and the Terms of Use for details. A COMPANION AND A WINDOWSILL Open the Windowsill on the Talk tab to visit your companion, who is by the window next to a potted plant. Drop by any time, even with nothing to do. During a conversation, a small ear mark at the top of the screen moves when KoeSapo hears a voice. After you save a conversation, a note at the bottom of the screen lets you mark it as enjoyed right away. Conversations you mark line up on the Conversations you enjoyed shelf as book-shaped covers. PERMISSIONS KoeSapo needs Microphone and Speech Recognition access to turn the other person’s voice into text. With the Speech Recognition setting on Online (the default), your audio is sent to Apple’s servers to be turned into text. Choose Offline in Settings to process speech on your device, if your device supports it. If you don’t allow access, you can still type and have KoeSapo speak for you. LEGAL Privacy Policy: https://koesapo.app/en/privacy/ Terms of Use: https://koesapo.app/en/terms/
Screenshots
Verdict
The clearest difference is update cadence: KoeSapo at every 4 days against UDTalk's every 10 days. UDTalk's advantage is device support (4 vs 1) and iOS requirement (15.0 vs 26.0). On price, ads and in-app purchases 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. UDTalk sells 2 in-app purchases, starting at $1.99 per 7 days and KoeSapo sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
UDTalk ships an update every 10 days, KoeSapo every 4 days. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | UDTalk | KoeSapo |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 55.6% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 10 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 53 MB | 27 MB |
| Age rating | 9+ | 4+ |
| Developer | Shamrock Records, Inc. | maruapp |
In-app purchases
UDTalk
- Compact Plan (1 week)$1.997 Days
- Compact Plan (1 month)$2.991 Month
KoeSapo
- KoeSapo Plus Monthly$4.991 Month
- KoeSapo Plus Yearly7 Days trial$39.991 Year





