InnoCaption vs DD Lock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
InnoCaption
This app provides free, real-time captions for phone calls, assisting individuals with hearing loss. It offers options for live stenographers or automated speech recognition, with features like text-to-speech shortcuts and transcript summaries for enhanced communication.
- Live call captioning (stenographer or ASR)
- Text-to-speech calling with AI refine
- Customizable TTS shortcuts
- AI-powered transcript summaries
- Save and view call transcripts
- Captioning for incoming and outgoing calls
- Spam call filter
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If hearing loss makes understanding phone calls challenging, try the InnoCaption app for free, fast, and accurate real-time call captions. InnoCaption is available at no cost to eligible users in the United States through funding from the FCC’s Telecommunications Relay Services (TRS) Fund. **** New Update **** • Custom Word List – Add custom words like names and specialized terms to improve real-time caption accuracy • Picture-in-Picture – Keep captions visible in a floating window while using other apps or browsing the web during a call REAL-TIME CAPTIONS FOR EVERY CALL • Switch between live stenographers or Automated Speech Recognition (ASR) captions at any time during your call • Available at no cost to individuals with hearing loss in the United States • Caption your calls in multiple languages, including Spanish, Chinese, Filipino, and more • Make and caption 3-way calls SEAMLESS CALLING & PERSONALIZATION • Get captions for both incoming and outgoing calls • Keep your existing phone number with our patented One Number technology • Use InnoCaption like your regular phone dialer – no need to make calls through a 711 relay • Customize the InnoCaption app to fit your accessibility needs TEXT-TO-SPEECH CALLING FEATURES • Use AI Refine to turn short responses into complete sentences at the touch of a button • Customize prewritten TTS Shortcuts for fast and effortless replies during calls ACCESSIBLE TRANSCRIPTS & VOICEMAIL • Save and view transcripts of previous calls • Generate concise AI-powered summaries of call transcripts • Access and read fully captioned voicemail messages SMART CONTACT INTEGRATION • Easily sync contacts from your phone to the InnoCaption app • Continue using your personal cell number by combining our caller ID and call-forwarding features EMERGENCY CALLS & SPAM FILTER • Built-in spam call filter blocks high-risk calls and provides notices for potential spam calls • Make 911 emergency calls with captions* *911 service may be limited or unavailable in the event of network disruptions or degradation, service connection or internet failure, or other circumstances. For more information, visit www.innocaption.com/calling-911 Cellular data plan or Wi-Fi is required to use the service. FEDERAL LAW PROHIBITS ANYONE BUT REGISTERED USERS WITH HEARING LOSS FROM USING INTERNET PROTOCOL (IP) CAPTIONED TELEPHONES WITH THE CAPTIONS TURNED ON. IP Captioned Telephone Service may use a live operator. The operator generates captions of what the other party to the call says. These captions are then sent to your phone. There is a cost for each minute of captions generated, paid from a federally administered fund. For more information, visit us at https://www.innocaption.com For assistance, contact us at support@innocaption.com
DD Lock
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1. 防盜功能特別強 : 因藍芽經特殊編譯,根本不可能被打開。 2. 方便的鑰匙管理 : 可自行分享數多個User Key,並可依照想開啟的馬達來開啟。 硬體功能: 1. 開關鎖成功時,DO、DE聲通知。 2. 藍色LED指示燈。
Screenshots
Verdict
The clearest difference is iOS requirement: DD Lock at 9.0 against InnoCaption's 15.1. On price, update cadence, 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. Neither carries in-app purchases, so what you see is what you pay.
InnoCaption ships an update weekly, DD Lock fortnightly. The most recent releases landed on October 15, 2026 and September 29, 2026 respectively.
| Parameter | InnoCaption | DD Lock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (12K ratings) — better | — |
| Positive reviews | 71.4% of reviews | — |
| Number of ratings | 12K — better | — |
| Update frequency | Weekly — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 9.0 — better |
| Further details — not scored | ||
| Size | 95 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Mezmo Corporation | SMARTCHIP MICROELECTRONICS CORP. |
Bugs and requests
InnoCaption
Reported bugs
3 issues- Incoming calls not always received or displayed
- App crashing or freezing during calls
- Issues with call forwarding setup
Requested features
4 requests- Ability to caption in-person conversations
- Integration with video calling apps
- Improved transcription accuracy for names and numbers
- Option to save call transcripts locally
DD Lock
Not enough reviews yet to summarise bugs or requests.
In-app purchases
InnoCaption
No in-app purchases
DD Lock
No in-app purchases









