Comparison

NDTD Language Shadower vs Heartword

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

Head to head
About

NDTD Language Shadower

Features
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Master spoken English by shadowing real speech, line by line, at your own pace. Language Shadower turns audio and video into hands-on speaking practice. Read along with synced subtitles, repeat the parts that trip you up, and record yourself so you can hear the difference. The goal is active practice, not passive listening. Three ways to practice Shadower: Your home library. Import or create lessons, open the player, and work with speed control, loops, play ranges, bookmarks, and voice recordings. Karaoke Shadow: Follow subtitles in time with the audio, like karaoke. Work on timing and pronunciation. You can run a normal shadow session or record screen and microphone to review or share later. R1200D: Short repeat drills from your own subtitle files. Generate practice lines, record yourself, and run pronunciation assessment when you want feedback on accuracy, fluency, and clarity. Create new practice material Auto Generate: Choose from fixed real-life topics (travel, work, daily life, and more). The app builds audio and subtitles you can shadow right away. Pick a male, female, or random voice. Scan: Photograph a printed page. Text is read on your device; the app turns it into spoken audio with subtitles for shadowing. Text: Paste or type a short passage and generate audio with subtitles. Books: Browse public-domain books or open your own PDF, select text, and generate audio for practice. Import your own files Add content from Files, Google Drive, OneDrive, or a URL. Supports common audio and video formats plus SRT subtitles. Use podcasts, lectures, clips, or anything else you already study with. Player tools Subtitles synced to playback Playback speed from slow to fast Loop and play range (start/end times) Skip forward or back (10 sec through 10 min) Bookmarks for difficult spots Microphone recording on the device On-device translation of subtitle text where supported Credits Some features use credits (generation, assessment, and recording modes when enabled). Buy credit packs in the app. New users may receive starter credits or promo access depending on current offers. Optional tips are separate from credits. Built for shadowing Shadowing is the same method many interpreters and coaches use: you speak along with native-like audio in real time. Language Shadower is organized around that habit instead of endless word lists. Privacy No account is required to use the app. Your imported files and recordings stay on your device. We do not show ads or run third-party analytics in the app. When you use generation or assessment, only the data needed for that request is sent to our servers, as described in the in-app Privacy Policy. Download Language Shadower and start speaking with more confidence today. All em dashes are removed. Section labels use colons instead. If you want it even plainer (fewer bold headers, more like your original block style), say so and I can flatten it.

About

Heartword

Features
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Know it by heart. Live it by heart. Heartword is a thoughtful Scripture memorization practice designed to help the words stay with you. Short daily sessions guide you through a proven learning sequence: โ€ข Discover โ€” read for meaning, structure, and rhythm โ€ข Rebuild โ€” reconstruct the verse through active recall โ€ข Complete โ€” retrieve missing words with helpful context โ€ข Recall โ€” type or recite the full verse from memory โ€ข Return โ€” review near the point of forgetting Heartword adapts review timing based on your recall, helping you strengthen difficult verses without turning your spiritual practice into pressure. FEATURES โ€ข Typed and optional spoken recall โ€ข Adaptive spaced review โ€ข Personal verse library โ€ข Custom verse entry โ€ข Mastery progress, daily rhythm, and streaks โ€ข Optional local practice reminders โ€ข World English Bible Updated at launch PRIVACY FIRST No account is required. Your progress, custom verses, preferences, and reminder schedule remain on your device in the current release. Heartword contains no advertising, third-party analytics, or cross-app tracking. Heartword is a memorization aid. Verify custom verse wording against a trusted Bible source.

Screenshots

NDTD Language Shadower4 screens
Heartword4 screens

Verdict

The call

The clearest difference is in-app purchases: Heartword at none against NDTD Language Shadower's 14. Heartword also leads on iOS requirement (16.0 vs 18.2.1). On price, update cadence, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. NDTD Language Shadower sells 14 one-off in-app purchases. Heartword asks for nothing beyond the download.

UpkeepUpdate frequency

NDTD Language Shadower ships an update every 3 weeks, Heartword every 2 weeks. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.

Scorecard2 real differences ยท 4 level
NDTD Language Shadower versus Heartword: the parameters behind the verdict, then further details
ParameterNDTD Language ShadowerHeartword
PriceFreeFree
Update frequencyEvery 3 weeksEvery 2 weeks โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS18.2.116.0 โ€” better
Further details โ€” not scored
Size13 MB2 MB
Age rating4+4+
DeveloperThanh Nam NguyenTimeTells Innovations LLC

In-app purchases

14 purchases

NDTD Language Shadower

One-time14
  • Support Tip 049$0.49
  • Karaoke Shadow Recording$0.49
  • 10 Credits$0.99
Show 11 more
  • Unlock Auto Gen$0.99
  • Support Tip 099$0.99
  • Support Tip 199$1.99
  • 60 Credits$2.99
  • Support Tip 299$2.99
  • 120 Credits$4.99
  • Support Tip 500$5.00
  • Medium Tip$10.00
  • Support Tip 1000$10.00
  • 1200 Credits$14.99
  • Support Tip 3000$30.00
None

Heartword

No in-app purchases

Questions

Is NDTD Language Shadower free?
NDTD Language Shadower is free to download, with in-app purchases available.
Is Heartword free?
Heartword is free to download, with no in-app purchases.
Do NDTD Language Shadower or Heartword have ads?
Neither NDTD Language Shadower nor Heartword shows ads.
Which is updated more often, NDTD Language Shadower or Heartword?
NDTD Language Shadower ships an update every 3 weeks, and Heartword every 2 weeks. Most recently, NDTD Language Shadower was updated on October 5, 2026 and Heartword on October 10, 2026.

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