Plot Spark vs Off Book
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Plot Spark
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Plot Spark ignites your next idea - with a single roll. Whether you're working on a novel, a short film, a tabletop RPG campaign, or just need a story for tonight: Plot Spark instantly delivers a character, a conflict, and a setting - random, unexpected, and inspiring. HOW IT WORKS Pick a kit, roll the dice - and get a complete story prompt with character, conflict, setting, and a wild twist. Sounds too simple? That's exactly the point. Prefer instant results over a dice animation? Turn the roll animation off and get straight to the prompt. ELEVEN KITS, EVERY GENRE Plot Spark ships with eleven curated kits - from neon-soaked noir and cosmic comedy to high-seas adventure, Cold War espionage, and Victorian hollow-earth expeditions. And you can create your own kits and fill every slot with your own ideas - tuned to exactly the tone you need. JOURNAL & MARKDOWN EXPORT Save every hit straight to your journal. Write notes, develop the idea, or let it simmer - your best prompts won't get lost. Export any entry, or your whole journal, as clean Markdown and keep working in your favorite writing app. FROM SPARK TO GAMEBOOK Your exported prompts are plain Markdown - the same format Story Weaver speaks, our free open-source language for writing branching gamebooks with choices, dice, and fights. Grow a rolled prompt into a full playable adventure: github.com/ComicSans/story-weaver NO SUBSCRIPTION. NO ACCOUNT. Plot Spark needs no internet connection, no login, and no subscription. Your ideas stay on your device. Perfect for: • Novelists and screenwriters • Tabletop RPG game masters • Short story writers • Game designers • Gamebook authors • Anyone who needs a creative spark
Off Book
This app helps actors memorize lines and rehearse scenes by providing character-specific dialogue playback. Users can paste, scan, or load scripts, then practice speaking their lines aloud while the app cues them. It offers features to hide lines for memory testing and drill difficult sections.
- Paste or scan scripts
- AI-powered auto-casting
- Character voice playback
- Hide lines for memory tests
- Drill difficult lines
- Save scenes to library
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Off Book: Run Lines Turn your script into a focused rehearsal session. Off Book: Run Lines is built for actors who want to learn lines, test their recall, and rehearse scenes without constantly relying on the script. SPEAK YOUR LINES Run through your script and practice your dialogue directly in the app. Stay focused on the scene while keeping your rehearsal session organized. FORGET THE PROMPTS Ready to test yourself? Hide your lines and see how much you can remember. Use your scene as a memory exercise and identify the parts that still need work. HIDE YOUR LINES Gradually move away from reading every line. Hide dialogue while keeping the scene structure available so you can practice recalling your lines instead of simply reading them. A scene partner that never gets tired of running lines. Paste or scan your script. Off Book: Run Lines works out who's speaking, gives every other character their own voice, and plays them opposite you then listens while you say your lines and shows you exactly where you're losing them. HOW IT WORKS 1. Add your scene — paste it, scan a printed page, or load a saved one. 2. Tap Auto-Cast. Off Book finds the characters and casts a voice for each. 3. Pick your part, and how much of your line you want to see. 4. Rehearse. When your line comes up, say it out loud. DRILL DIFFICULT LINES Some lines take more practice than others. Focus your rehearsal on the sections you struggle with and repeat them until they become easier to recall. CAST THE SCENE Rehearse with character-focused dialogue and voice playback to help you work through your scene and understand when your lines come in. BUILT FOR ACTORS Whether you're preparing for an audition, learning a new scene, working on a monologue, or rehearsing for a performance, Off Book: Run Lines helps turn script practice into a repeatable routine. ALSO INSIDE • Scan a printed script with the camera • Teach it how to say any name once, and it says it that way everywhere • Set each character's voice, pitch and pace • Save scenes to your library Practice your lines. Test your memory. Get off book. Subscription Details: • Title: Savory All Access • Length: 1 year • Price: $39.99 per year, $7.99 per week (auto-renews) & Lifetime $69.99 • Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Privacy Policy: https://docs.google.com/document/d/1IysoItFPBXxdxDkkTJ6FRT1Of8qXqAwwB0op5coC1nU/edit?usp=sharing
Screenshots
Verdict
The clearest difference is in-app purchases: Plot Spark at none against Off Book's 3. Off Book's advantage is update cadence (every 2 days vs every 2 months). On price, ads, device support and iOS requirement 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. Off Book sells 3 in-app purchases, starting at $7.99 per 7 days. Plot Spark asks for nothing beyond the download.
Plot Spark ships an update every 2 months, Off Book every 2 days. The most recent releases landed on October 28, 2026 and October 22, 2026 respectively.
| Parameter | Plot Spark | Off Book |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.6 — better |
| Further details — not scored | ||
| Size | 6 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Tobias Reithmeier | KELVIN SENANU WALLACE |
In-app purchases
Plot Spark
No in-app purchases
Off Book
- Pro Access for a week$7.997 Days
- All Access for a year$39.991 Year
- All Access Forever$69.99









