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 scripts by recording lines for themselves and other characters. It offers customizable repetition cycles and seamless playback control, even with wireless earbuds and smartwatches.
- Record lines for self and others
- Customizable repetition cycles
- Seamless playback control
- AirPods and Apple Watch integration
- CarPlay support
Read full descriptionHide full description
Struggling to memorize your script lines? Luna Lines is here to make it easier! - Record Your Lines: Easily record your lines (Me) and the lines of other characters (Them) from your script. - Repetition Cycles: Choose from 6 different repetition cycles, including silent spaces for you to practice saying your lines out loud (Your Turn). - Seamless Playback: Each recording is sent as a song, allowing you to control playback from anywhere, including your AirPods, Apple Watch or CarPlay. - Enjoy the convenience of using AirPods with double-tap to skip forward and triple-tap to skip backward. - Scan your paper scripts or PDFs directly to Luna Lines format. Read your scripts on dark mode and with clear fonts. Limited for Free, unlimited* scans for Pro. - Generate voices out of your script. Limited for Free, unlimited* voice generation for Pro. *Under our Fair Usage Policy available at https://lunalines.app/terms CONTACT US Learn more at lunalines.app Say hi: hello@lunalines.app or @appsfromluna on Instagram Terms of Use: lunalines.app/terms Privacy Policy: https://lunalines.app/privacy
Understudy
Read full descriptionHide full description
Record your scene partner's lines, then practice the back-and-forth on your own. ◆ Who it's for Actors, voice actors, comedians, presenters — anyone who has to learn lines and then perform in front of people. Professional or not. ◆ How it works 1. Record your scene partner's lines 2. On the practice screen, play them back and say your own lines out loud 3. Tap to play. The app moves to the next line for you ◆ What you can do Work without looking at the screen Tap and swipe are all you need, so you can move around and keep your eyes up. Every action comes back as a small vibration. Change the playback speed From 0.5x to 2.0x. Slow it down to check a passage, or speed it up for a quick run-through. Attach a PDF script Link a PDF to a work and read it while you record. The file stays on your device — Understudy only points to it, so nothing is uploaded anywhere. Add bookmarks and jump to a page in one tap. Bring in audio you already have Import music or any audio file you've prepared. Useful when you practice against a sound cue. Export your recordings and share them Export a scene as a ZIP. Move it to another device, or hand it to the person you're working with. You can also practice against a ZIP someone else recorded, with their voice as your scene partner. ◆ From the developer At home, on the way to rehearsal, or in the hour before a performance — I wanted something I could practice with anywhere. That's why I made this. I hope it helps you. ◆ About Understudy Pro Everything you need to practice stays free. With Understudy Pro you can see more of your data on the Practice Ticket and choose from all 7 ticket designs. You also get the Pro colors, and you can set a color of your own. Understudy Pro is an auto-renewing subscription, available monthly or yearly. It renews at the same price unless you cancel at least 24 hours before the current period ends. You can cancel any time from Manage subscription in the app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shimeco.github.io/understudy-pages/privacy.html
Screenshots
Verdict
The clearest difference is iOS requirement: Understudy at 14.0 against Luna Lines's 26.0. On price, update cadence, 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 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Luna Lines ships an update every 3 weeks, Understudy monthly. The most recent releases landed on September 13, 2026 and September 14, 2026 respectively.
| Parameter | Luna Lines | Understudy |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (11 ratings) — better | — |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 26.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 25 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Luna Technologies Inc. | Shingo Otsuhata |
In-app purchases
Luna Lines
- Lines Pro$4.991 Month
- Lines Pro$19.991 Year
Understudy
- Buy me a coffee$0.99
- Add a donut$1.99
- Add a sandwich$3.99









