Luna Lines vs Understudy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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
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.
- Memorize lines
- Rehearse scenes
- Collaborate with performers
- Book work
- Audition preparation
- Hone acting craft
Read full descriptionHide 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
Verdict
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
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.
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.
Luna Lines ships an update every 3 weeks, Understudy every 10 days. Both last shipped on November 4, 2026.
| Parameter | Luna Lines | Understudy |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (11 ratings) | 4.4 (12 ratings) — better |
| Positive reviews | 57.1% of reviews | 90.0% of reviews — better |
| Number of ratings | 11 | 12 — better |
| Update frequency | Every 3 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 — better | 26.4 |
| Further details — not scored | ||
| Size | 32 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Luna Technologies Inc. | UNDERSTUDY TECHNOLOGIES LLC |
Customer experience
Luna Lines
Understudy
In-app purchases
Luna Lines
- Lines Pro$4.991 Month
- Lines Pro$19.991 Year
Understudy
- Understudy Pro$1.997 Days
- Understudy Pro$5.991 Month
- Understudy Pro$19.991 Year





