Comparison

CaptionLab vs AutoSub

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

Head to head
About

CaptionLab

Instantly generate unlimited AI-powered captions for your photos and videos. Choose from various styles, tones, and lengths to enhance your social media content and captivate your audience. Available in over 25 languages.

Highlights
  • Unlimited AI captions
  • Customizable style, tone, and length
  • Multilingual support (25+ languages)
  • Ad-free premium experience
  • No account required
  • Instant caption generation
Features
Read full description

CaptionLab — AI Caption Generator Create unlimited AI captions tailored to your photos, videos, vibe, and style — instantly. CaptionLab delivers perfect captions in seconds. Struggling to find the perfect words for your stunning photos or videos? CaptionLab has the solution! A well-crafted caption helps you stand out, captivate followers, and grow your audience. Why CaptionLab? Unlimited Captions for photos and videos with no daily limits Choose style, tone, and length (Premium): from witty to deep, short to long Multilingual Support: English, Russian, Spanish, and 22+ more languages! Ad-free with the Premium plan Upgrade to Premium for custom tones, styles, and an ad-free experience! Craft like a pro with CaptionLab—your creative assistant turning Instagram posts into standout moments. The world is waiting for your content! Available for iPhone (iOS 15+). No account needed — start creating in seconds. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

AutoSub

This app offers advanced video subtitle and translation services using AI. It supports numerous languages and transcription modes, with options for offline processing and on-device privacy. Users can edit, sync, and export subtitles in various formats, including burned-in captions on video exports.

Highlights
  • AI-powered transcription
  • 50+ language support
  • Offline translation
  • Subtitle editing and syncing
  • Video OCR for text extraction
  • Customizable subtitle export
  • On-device processing
Features
Read full description

AutoSub is a professional subtitle and video translation studio for iPhone and iPad. Six transcription modes, 50+ languages, AI-powered translation, and full offline privacy — all on-device. Built for content creators, educators, filmmakers, and video editors. Transcription • 6 transcription modes, all processed on-device • Fast: quick speech-to-text, 10 languages • Accurate: 3 model variants (Standard, Balanced, Max) supporting 50 languages with high-quality transcription • Fusion: 2 model variants — English & European (25 languages, ultra-fast) and Multilingual (30+ languages including Chinese, Japanese, Korean, Arabic, and Hindi) Translation • Apple Translate: fully offline, 17 languages • Google Translate: fully offline, 50+ languages • AI Translate: context-aware cloud translation using advanced AI models like Gemini and GPT — handles slang, idioms, and natural phrasing • AI Enhance: improve existing translations at lower cost without retranslating from scratch • Switch between AI models in Settings Subtitles & Editing • View all subtitle lines in one clean place • Edit both original transcript and translated text per segment • Copy individual subtitle lines • Subtitle sync adjustment (fine-tune timing from -5 to +5 seconds) • Dual subtitle display (show original and translation together) • Import existing SRT files Video OCR • Draw a rectangle on the video to select on-screen text • Translate signs, captions, graphics, and any visual text instantly Export • SRT file export (original or translated) • Video export with burned-in subtitles and captions, up to 4K at 24/30/60fps • Customizable subtitle styling: font, size, weight, color, position, shadow, and background Offline & Private • All transcription and offline translation run entirely on-device • Your video and audio never leave your iPhone or iPad Pro Subscription • Unlocks unlimited transcription, AI Translate, AI Enhance, Accurate and Fusion modes, offline language downloads, SRT exports, 4K video exports, and all advanced features Payment charged to your Apple ID account Auto-renews unless canceled 24 hours before renewal Manage in App Store account settings Privacy Policy https://basels.tech/privacy-policy-autosub-ai/ Terms of Use https://basels.tech/terms-of-use-autosub-ai/

Screenshots

CaptionLab4 screens
AutoSub4 screens

Verdict

The call

The clearest difference is ads: AutoSub at none against CaptionLab's shown. AutoSub also leads on ratings volume (64 vs 1) and update cadence (weekly vs fortnightly). CaptionLab's advantage is rating (5.0 vs 4.7) and iOS requirement (15.6 vs 18). On price, in-app purchases, monetization model 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. CaptionLab sells 1 in-app purchase, starting at $0.99 per month and AutoSub sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

CaptionLab holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: AutoSub has 64 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

CaptionLab ships an update fortnightly, AutoSub weekly. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

Scorecard5 real differences · 5 level
CaptionLab versus AutoSub: the parameters behind the verdict, then further details
ParameterCaptionLabAutoSub
PriceFreeFree
Rating5.0 (1 ratings) — better4.7 (64 ratings)
Positive reviews—87.5% of reviews
Number of ratings164 — better
Update frequencyFortnightlyWeekly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPodiPhone, iPad, Mac — better
Requires iOS15.6 — better18
Further details — not scored
Size13 MB231 MB
Age rating4+4+
DeveloperDmytro HryshaninBasel Baragabah

In-app purchases

1 purchases

CaptionLab

Subscriptions1
  • Premium Plan$0.991 Month
2 purchases

AutoSub

Subscriptions2
  • Pro Weekly$5.997 Days
  • Pro Yearly$49.991 Year

Questions

Is CaptionLab free?
CaptionLab is free to download, with in-app purchases available.
Is AutoSub free?
AutoSub is free to download, with in-app purchases available.
Which has better reviews, CaptionLab or AutoSub?
CaptionLab is rated higher. CaptionLab averages 5.0 out of 5 from 1 ratings, while AutoSub averages 4.7 from 64 ratings.
Do CaptionLab or AutoSub have ads?
CaptionLab shows ads; AutoSub does not.
Which is updated more often, CaptionLab or AutoSub?
CaptionLab ships an update fortnightly, and AutoSub weekly. Most recently, CaptionLab was updated on October 30, 2026 and AutoSub on November 5, 2026.

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