Comparison

Luna Lines vs Understudy

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

Head to head
About

Luna Lines

This app helps actors memorize lines by turning scripts into interactive rehearsal partners. Record scenes, mark your part, and practice with generated voices or your own recordings. Scripts are available offline and can be organized in a library.

Highlights
  • Record and rehearse scripts
  • Mark lines as 'Me' or 'Them'
  • Practice with repetition patterns
  • Offline script access
  • Organize scripts in a library
  • Generate character voices (Pro)
  • Share scripts across devices
Features
Read full description

Learn your lines by hearing them. Luna Lines turns any script into a rehearsal partner: record the scene, mark your part, and practice with space to say every line out loud. RECORD AND REHEARSE FOR FREE No account needed. Record your lines and your scene partners' lines in your own voice, then mark each one as Me or Them. Pick a repetition pattern, and Luna Lines plays the other characters and leaves a pause for Your Turn. Unlimited lines, always free. ALWAYS KNOW YOUR CUE The now-playing cue shows who's speaking and lights up when it's your turn. Rehearsals play like music, so you can run lines from the Lock Screen, AirPods, Apple Watch or CarPlay. YOUR SCRIPTS, READY OFFLINE Keep every script organized in a library with folders, right on your iPhone. Practice with saved scripts and recordings without a connection, and read comfortably with larger text, dark mode and your character highlighted. A SCENE PARTNER WHENEVER YOU NEED ONE With Pro, generate voices for the other characters and give them their lines in moments, so you can rehearse even when no one is around to read with you. LUNA LINES PRO For actors who want to go further, and a way to support our small team. Pro requires an account and is available as a monthly or yearly subscription. • Turn PDFs, photos and paper scripts into editable lines. Luna Lines finds the scenes and characters for you. • Generate voices for every scene partner. • Export PDFs without a watermark. Scanning and voice generation are unlimited under our fair use policy. Scanned lines are yours to keep. TRY PRO EVERY MONTH Create a free account to get monthly credits for Pro features. Recording and rehearsing stay free, with or without an account. DESIGNED FOR iPHONE DUO Controls move to the side, so your script gets the whole screen. SHARE ACROSS DEVICES Share your scripts across devices and keep practicing wherever you are. From an audition side to opening night, make a little time to run lines every day. Terms of Use: https://lunalines.app/terms Privacy Policy: https://lunalines.app/privacy Say hi: hello@lunalines.app or @appsfromluna on Instagram

About

Understudy

This app helps actors memorize lines, rehearse scenes, and connect with other performers. It serves as a personal scene partner, accessible anytime, anywhere, to aid in audition preparation and skill development.

Highlights
  • Memorize lines
  • Rehearse scenes
  • Collaborate with performers
  • Book work
  • Audition preparation
  • Hone acting craft
Features
Read full description

Designed for actors from the ground up, Understudy is the essential tool to help you memorize lines, rehearse scenes, collaborate with fellow performers, and book work. Whether you're preparing for an audition, getting off book, or just honing your craft, Understudy is your personal scene partner, available anytime, anywhere. For Support: https://get.understudy.app/support Privacy Policy: https://get.understudy.app/privacy/ios Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Luna Lines4 screens
Understudy2 screens

Verdict

The call

The clearest difference is rating: Understudy at 4.4 against Luna Lines's 3.5. Understudy also leads on review sentiment (90% vs 57%) and update cadence (every 10 days vs every 3 weeks). 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. Luna Lines sells 2 in-app purchases, starting at $4.99 per month and Understudy sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Understudy holds the better App Store score, 4.4 against 3.5. Both are backed by a comparable volume of ratings — 11 and 12 respectively. Written reviews point the same way: 57% of Luna Lines's written reviews are positive against 90% of Understudy's.

UpkeepUpdate frequency

Luna Lines ships an update every 3 weeks, Understudy every 10 days. Both last shipped on November 4, 2026.

Scorecard3 real differences · 7 level
Luna Lines versus Understudy: the parameters behind the verdict, then further details
ParameterLuna LinesUnderstudy
PriceFreeFree
Rating3.5 (11 ratings)4.4 (12 ratings) — better
Positive reviews57.1% of reviews90.0% of reviews — better
Number of ratings1112 — better
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.0 — better26.4
Further details — not scored
Size32 MB40 MB
Age rating4+4+
DeveloperLuna Technologies Inc.UNDERSTUDY TECHNOLOGIES LLC

Customer experience

Luna Lines

All ratings11 ratings
Positive54.5%
Neutral9.1%
Negative36.4%
Written reviews7 reviews
Positive57.1%
Neutral14.3%
Negative28.6%

Understudy

All ratings12 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews10 reviews
Positive90.0%
Neutral0.0%
Negative10.0%

In-app purchases

2 purchases

Luna Lines

Subscriptions2
  • Lines Pro$4.991 Month
  • Lines Pro$19.991 Year
3 purchases

Understudy

Subscriptions3
  • Understudy Pro$1.997 Days
  • Understudy Pro$5.991 Month
  • Understudy Pro$19.991 Year

Questions

Is Luna Lines free?
Luna Lines is free to download, with in-app purchases available.
Is Understudy free?
Understudy is free to download, with in-app purchases available.
Which has better reviews, Luna Lines or Understudy?
Understudy is rated higher. Luna Lines averages 3.5 out of 5 from 11 ratings, while Understudy averages 4.4 from 12 ratings.
Do Luna Lines or Understudy have ads?
Neither Luna Lines nor Understudy shows ads.
Which is updated more often, Luna Lines or Understudy?
Luna Lines ships an update every 3 weeks, and Understudy every 10 days. Most recently, Luna Lines was updated on November 4, 2026 and Understudy on November 4, 2026.

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