Comparison

Subtitles AI vs Sub4Video

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

Head to head
About

Subtitles AI

This app automatically generates accurate captions, transcripts, and translations for videos and audio without length limits. It features speaker detection, animated caption styles, and a teleprompter for recording scripts. Export options include SRT, VTT, and burned-in captions.

Highlights
  • Automatic caption generation
  • Multi-language transcription
  • Speaker detection and labeling
  • Animated caption styles
  • Video and audio translation
  • Teleprompter with voice following
  • Export to SRT, VTT, TXT
Features
Read full description

Subtitles AI turns any video or audio into accurate captions, transcripts and translations — with no length limit. Detect who is speaking, animate captions word by word, and record with a teleprompter that follows your voice. AUTO CAPTIONS AND TRANSCRIPTION • Accurate transcription in 99 languages, with the spoken language detected automatically • Several languages in one video: give each part its own language, and the translation follows every line • Video and audio alike: MP4, MOV, M4A, MP3 and more • No length limit: full films, lectures, podcasts and long interviews • Smart punctuation, and captions that end where the sentence ends WHO SAID WHAT • Automatic speaker detection • Every speaker gets a color and a name • Show the speaker's color and name on the video itself • Rename, merge and filter speakers in one tap ANIMATED CAPTIONS • Karaoke captions that light up word by word • Fade, pop, slide and one-word-at-a-time styles • Fonts, colors, outline, background and position • Ready-made styles for short vertical videos TRANSLATE INTO 135 LANGUAGES • Translate captions into 135 languages • Show two languages at once for bilingual viewers • Several subtitle tracks from one recording AN EDITOR THAT FITS THE JOB • Timeline + List, List, Transcript, Timeline, Cards and Speakers views • Drag, trim, split and merge on the timeline • Search and replace across the whole file • Warnings show what still needs fixing AI SUMMARY • One tap turns a long recording into a title and a summary • Key topics and notable quotes, pulled out for you TELEPROMPTER AND AI SCRIPTS • Describe a topic and get a script that is ready to read • Or start from Today's News: pick a story and get a script • The teleprompter follows your voice and scrolls as you speak • Reading guide, countdown, mirror mode and Bluetooth remote • Record with the camera behind the text, or read the script only • Recordings go straight into Projects and start transcribing EXPORT • SRT, VTT and TXT • Burn captions into the video: MP4, MOV, H.265, up to 8K • Add your own logo PRIVACY • Nothing is uploaded without your permission • Your content stays yours TRANSCRIPTION LANGUAGES English, Spanish, French, German, Italian, Portuguese, Dutch, Russian, Ukrainian, Polish, Turkish, Arabic, Hebrew, Hindi, Chinese, Japanese, Korean, Vietnamese, Thai, Indonesian, Swedish, Danish, Norwegian, Finnish, Greek, Czech, Romanian, Hungarian and 71 more. SUBSCRIPTION INFORMATION • Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period • Manage or cancel at any time in your App Store account settings • Terms of Use: https://legotechapps.com/subtitles-ai/terms • Privacy Policy: https://legotechapps.com/subtitles-ai/privacy

About

Sub4Video

Effortlessly generate subtitles for your videos with automatic transcription and syncing. Edit, export in popular formats, and improve accessibility for online courses and private sites. Save time and technical effort in video content creation.

Highlights
  • Automatic audio to text transcription
  • Automatic text synchronization with video
  • Easy subtitle editing
  • Export to SRT, SUB, VTT formats
  • Glued subtitles to video
  • Collaborative editing
Features
Read full description

Transcribe and generate automatically subtitles for videos! For a private site, for your online courses, for accessibility compliance, to break language barriers, having subtitles for your videos is a great way to add value to your video content. Creating them manually is a tedious and time consuming process that requires also technical knowledge, that's why we created Sub4Video! Sub4Video is a new web & mobile app that solves all this problems: -> Automatic audio to text transcribing using best machine learning speech to text technology. -> Automatic sync of the text with the video, from the start and ending time when phrases are made. -> Easy to use editor. Change, add, remove generated subtitles! -> Export to most popular formats (.srt, .sub, .vtt) youtube compatible and even glued to the source video! -> Easy preview of the final result, from any device plus collaborative edition. A 15 minutes video or audio resource can be transcribed and exported with a subtitle for about $3 USD!

Screenshots

Subtitles AI4 screens
Sub4Video4 screens

Verdict

The call

The clearest difference is rating: Subtitles AI at 4.5 against Sub4Video's 1.8. Subtitles AI also leads on update cadence (every 2 days vs every 2 months) and review sentiment (19% vs 0%). Sub4Video's advantage is iOS requirement (11.0 vs 15.6). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Subtitles AI sells 10 in-app purchases, starting at $6.99 per month and Sub4Video sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Subtitles AI holds the better App Store score, 4.5 against 1.8. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews point the same way: 19% of Subtitles AI's written reviews are positive against 0% of Sub4Video's.

UpkeepUpdate frequency

Subtitles AI ships an update every 2 days, Sub4Video every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Subtitles AI versus Sub4Video: the parameters behind the verdict, then further details
ParameterSubtitles AISub4Video
PriceFreeFree
Rating4.5 (4 ratings) — better1.8 (4 ratings)
Positive reviews18.7% of reviews — better0.0% of reviews
Number of ratings44
Update frequencyEvery 2 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.611.0 — better
Further details — not scored
Size75 MB18 MB
Age rating4+4+
DeveloperiPhoneTelAviviIpsilon Developments Inc

Customer experience

Subtitles AI

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%
Written reviews203 reviews
Positive18.7%
Neutral9.4%
Negative71.9%

Sub4Video

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Subtitles AI

Reported bugs

4 issues
  • App crashes during video processing
  • Subtitles not syncing properly with audio
  • Translations completely off or missing words
  • App resets to demo mode even after paid subscription

Requested features

5 requests
  • Add ability to manually edit and position subtitles
  • Improve translation accuracy, especially for non-English languages
  • Provide more language options
  • Allow exporting of transcripts and subtitles without video
  • Improve stability and reduce crashes

Sub4Video

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Subtitles AI

Subscriptions8
  • Annual1 Month trial$6.991 Month
  • Basic Monthly3 Days trial$7.991 Month
  • Weekly3 Days trial$9.997 Days
Show 5 more
  • Pro Weekly$12.007 Days
  • Professional3 Days trial$23.491 Month
  • Basic - Annual (Pay up Front)3 Days trial$59.991 Year
  • Pro - Annual3 Days trial$175.991 Year
  • Business$300.001 Month
One-time2
  • CC-Credits Small Pack$3.99
  • Big Translations Pack$9.99
5 purchases

Sub4Video

One-time5
  • 100 Credits Recharge$0.99
  • 200 Credits Recharge$1.99
  • 500 Credits Recharge$4.99
Show 2 more
  • 1000 Credits Recharge$9.99
  • 2000 Credits Recharge$19.99

Questions

Is Subtitles AI free?
Subtitles AI is free to download, with in-app purchases available.
Is Sub4Video free?
Sub4Video is free to download, with in-app purchases available.
Which has better reviews, Subtitles AI or Sub4Video?
Subtitles AI is rated higher. Subtitles AI averages 4.5 out of 5 from 4 ratings, while Sub4Video averages 1.8 from 4 ratings.
Do Subtitles AI or Sub4Video have ads?
Neither Subtitles AI nor Sub4Video shows ads.
Which is updated more often, Subtitles AI or Sub4Video?
Subtitles AI ships an update every 2 days, and Sub4Video every 2 months. Most recently, Subtitles AI was updated on November 6, 2026 and Sub4Video on November 3, 2026.

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