Comparison

CaptionStudio vs SRT Subtitle Toolbox Mobile

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

Head to head
About

CaptionStudio

This app transforms audio and video into editable, translatable, and exportable timed captions. It also offers features for meeting notes, live floating captions, and conversation translation, all processed and stored locally on your device for enhanced privacy.

Highlights
  • Audio and video caption generation
  • Caption translation and editing
  • Meeting note transcription and organization
  • Live floating captions for apps
  • On-device conversation translation
  • Multiple export formats (SRT, WebVTT, TXT, MP4)
Features
Read full description

Turn audio and video into editable, translatable, export-ready timed captions—and keep meetings and conversations on your device. CaptionStudio brings media captions, meeting notes, floating captions, and conversation translation into one app. No account is required. Media, recordings, captions, and saved translation history are processed and stored on device by default. AUDIO & VIDEO CAPTIONS • Import MOV, MP4, M4V, M4A, MP3, WAV, or AAC files, or choose a video from Photos • Generate timed captions with native speech recognition • Play, seek, correct, split, merge, and add captions on a visual timeline • Translate captions and edit original, translated, or bilingual text • Customize fonts, size, colors, outline, background, and position • Export SRT, WebVTT, or TXT, or burn captions into an MP4 video MEETING NOTES • Record audio while creating a transcript • Organize the transcript into an overview, key points, decisions, and action items • Replay the recording and edit every section • Export meeting notes with the transcript as Markdown FLOATING CAPTIONS • Use iOS system broadcasting to transcribe audio from supported apps • Follow live captions in Picture in Picture • Show original, translated, or bilingual captions • Customize window ratio, text size, lines, alignment, colors, and background • DRM, broadcast, and audio-source restrictions may prevent some content from being transcribed CONVERSATION TRANSLATION • Speak a phrase, translate it, and hear it aloud • Swap source and target languages • Keep conversation history on device and delete it at any time PRIVACY FIRST • No account, ads, or developer-operated cloud upload • No third-party analytics or advertising SDKs • iOS manages required language resources; some models may need to be downloaded before first use • Recognition, translation, and language availability depend on the device, system version, and available models New users receive a 7-day full-feature trial on first launch. After the trial, choose a one-year access purchase that does not auto-renew or a lifetime unlock. Purchases and refunds are handled by Apple. Speech recognition, translation, and generated notes can be affected by accents, noise, overlapping speakers, and system models. Review important content against the original recording or video.

About

SRT Subtitle Toolbox Mobile

Features
Read full description

SRT Subtitle Toolbox Mobile is a professional iOS workflow for SubRip (SRT) files. Built for subtitle teams, translators, editors, and multilingual video creators, it brings desktop-grade subtitle production to iPhone and iPad: merge, split, align, re-segment, and quality-check—without leaving your device. All processing runs locally. Your files stay on the device. No cloud upload is required, so client assets and unpublished content remain private. KEY CAPABILITIES 1. Combine Import multiple SRT files, join them in order, and stack timelines automatically into one delivery-ready file. 2. Split bilingual Separate a two-language SRT into two independent files for distribution, review, or further translation. 3. Merge bilingual Combine source and translation SRTs into a two-line bilingual file (source on top, translation below). 4. TXT to SRT / SRT to TXT Turn plain or bilingual text into timed SRT for your NLE, or strip timing and export clean text for translators. 5. Match translated scripts Pair a timed original SRT with an untimed translator draft to produce a timed bilingual file—built for real production handoff. 6. Text filter Keep Chinese, English, or the inverse, drop empty lines, and export SRT. 7. Pinyin / Zhuyin Convert cues to pinyin or Zhuyin, optionally with tones and the original line. 8. Time shift Move the entire timeline earlier or later to fix sync. 9. Smart split Re-segment Whisper and similar ASR output in Chinese and English so translation and layout stay clean. 10. Crop Keep only the time range you need. 11. Reformat Split long cues by character limit, deduplicate adjacent lines, and flatten multi-line text. 12. Prefix / suffix Batch-add speaker names or labels to selected or all cues. 13. Interval cleanup Close gaps that are too small between adjacent cues. 14. Find & replace Run multiple replacement schemes across multiple files to keep terminology consistent. 15. Statistics Count characters, speech rate (CPS), and lines, and highlight cues over your threshold before delivery. WHO IT’S FOR Subtitle groups, localization teams, freelance translators, course and short-form creators, and anyone who needs a reliable SRT finish on the go. EXPORT UNLOCK The app is free to use. Exporting results requires unlock: • Lifetime — one-time purchase, export forever (best value) • Yearly — 7-day free trial, then auto-renews annually Subscription terms: Payment is charged to your Apple ID. The yearly subscription renews automatically unless canceled at least 24 hours before the end of the current period. Renewal is charged within 24 hours prior to the end of the current period. Manage or cancel anytime in Settings > Apple ID > Subscriptions. Lifetime unlock is a non-consumable in-app purchase. Prices are shown in the app at the time of purchase. Support: hahale89#outlook.com (replace # with @) Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CaptionStudio4 screens
SRT Subtitle Toolbox Mobile4 screens

Verdict

The call

The clearest difference is iOS requirement: SRT Subtitle Toolbox Mobile at 18.0 against CaptionStudio's 26.0. 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. CaptionStudio sells 1 one-off in-app purchase and SRT Subtitle Toolbox Mobile sells 2 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
CaptionStudio versus SRT Subtitle Toolbox Mobile: the parameters behind the verdict, then further details
ParameterCaptionStudioSRT Subtitle Toolbox Mobile
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequency—Daily
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.018.0 — better
Further details — not scored
Size10 MB6 MB
Age rating4+4+
Developer夏骏 倪鹏 边

In-app purchases

1 purchases

CaptionStudio

One-time1
  • 永久会员$1.99
2 purchases

SRT Subtitle Toolbox Mobile

Subscriptions1
  • Yearly Export Unlock$4.991 Year
One-time1
  • Unlock Export Lifetime$2.99

Questions

Is CaptionStudio free?
CaptionStudio is free to download, with in-app purchases available.
Is SRT Subtitle Toolbox Mobile free?
SRT Subtitle Toolbox Mobile is free to download, with in-app purchases available.
Do CaptionStudio or SRT Subtitle Toolbox Mobile have ads?
Neither CaptionStudio nor SRT Subtitle Toolbox Mobile shows ads.

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