Comparison

Roll 20! vs PrismScroll Cthulhu

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

Head to head
About

Roll 20!

This application provides a straightforward and user-friendly dice rolling experience directly on your Apple Watch. Easily select from a variety of standard dice types or create custom modifiers for your rolls.

Highlights
  • Dice roller for Apple Watch
  • Supports D4, D6, D8, D10, D12, D20, D100
  • Add custom modifiers
  • Quick roll selection
Features
Currently charting
Read full description

Roll 20! is a dice roller made for Apple Watch. Raise your wrist, tap, and the dice tumble across the screen and land on your result. No phone, no table needed. DICE FOR EVERY GAME Roll a d4, d6, d8, d10, d12, d20 or d100. Perfect for Dungeons & Dragons, Pathfinder and any other tabletop role-playing game, board games and quick decisions. 3D DICE Real 3D dice that tumble and land on your result. Prefer the classic look? Switch to a big, clear number in Settings. ROLL SEVERAL DICE AT ONCE Roll up to 8 dice together, for example 3d6 for ability scores or 8d6 for a fireball. You see every die and the total. ADVANTAGE AND DISADVANTAGE Roll two d20 and keep the higher (advantage) or the lower (disadvantage) with one tap. The die that does not count fades out. NATURAL 20 AND NATURAL 1 A natural 20 gets a golden flash and a celebratory tap on your wrist. A natural 1 gets a wobble and a sad tap. The effects can be switched off. MODIFIERS Turn the Digital Crown or tap + and − to add a modifier. Add it once to the total, or to every roll. YOUR COLORS Choose a color for each die and for its numbers from the presets, or mix your own custom color. ROLL IN WAYS THAT FIT YOU • Tap the die, shake your wrist, or use Double Tap (Apple Watch Series 9, Series 10, Ultra 2 and later). • Ask Siri: "Roll a d20 in Roll 20!" • Use the "Roll dice" action in Shortcuts, or assign it to the Action button on Apple Watch Ultra. • Add the complication to your watch face and open a d20 straight from it. MADE FOR THE WRIST • Total of all your rolls, so you can keep track during a fight • Rolling sounds and haptics, each can be switched off • Always-On display support • VoiceOver support and Reduce Motion

About

PrismScroll Cthulhu

This app streamlines the creation and management of characters for the Call of Cthulhu 7th edition tabletop role-playing game. It offers a step-by-step creation process, equipment tracking, and the ability to export character sheets to PDF.

Highlights
  • Step-by-step character creation
  • Automatic calculation
  • Equipment tracking
  • Custom occupation and item creation
  • Unlimited character creation
  • PDF character sheet export
  • Cthulhu Journal for detailed accounts
Features
Read full description

Why. PrismCthulhu is the last Call of the Cthulhu Character Sheet Builder you’ll ever need to download! Beautifully designed for your mobile devices, PrismCthulhu offers the most powerful combination between clean aesthetic and impressive functionality. Manage all your Call of the Cthulhu 7th edition characters in one place. Feedback. PrismScroll is devoted to creating an exceptional experience for all levels of Call of the Cthulhu players. We're very thankful for all the great feedback we've received thus far. Our team is dedicated to providing continuous updates with the goal of becoming the go-to digital character sheet. We read and respond to all user reviews because we know that YOU are going to be the ones that make PrismScroll the best it can be. Support. You will not get better support from any other app than from PrismScroll. Join our active Discord community and get involved today! Features. Seamless Character Creation. Automatic Calculation. No Ads Mobile Sheet. Compact, Mobile Friendly Digital PrismScroll designed character sheet. Character Creation. A complete, step by step character creation process that has skill selection, ability adjustment distribution, custom occupation capabilities, and much more. Equipment Tracking. Keep track of your assets and equipment easily with a full page dedicated to seeing all your weapons and items. Custom Creator. Want to create something new? Use our custom creator feature to create all kinds of new things. Create new Occupations, powerful new weapons, or something as simple as a new item. Unlimited Character Creation. Test out more builds and quickly spin up NPC's for your games with unlimited character creation Paper Sheet. One click PDF character sheet export in case you want to have a hard copy of your character sheet. Journal. Easily create itemized entries for NPC profiles and other more detailed accounts in the Cthulhu Journal. Join Us! Download the app now and enjoy the Best Digital Call of the Cthulhu 7th Edition Character Sheet to date! Social Media. Instagram @prismscroll Twitter @prismscroll Facebook @prismscroll Disclaimer. On first install, PrismScroll contains information that is available in the free rules for distributed by Chaosium. Join our discord channel via the link in the app settings for more information and visit our Youtube channel for quick tutorial videos.

Screenshots

PrismScroll Cthulhu4 screens

Verdict

The call

The clearest difference is rating: PrismScroll Cthulhu at 4.8 against Roll 20!'s 3.7. PrismScroll Cthulhu also leads on device support (4 vs 2) and iOS requirement (12.0 vs 17.0). Roll 20!'s advantage is price ($0.99 vs $2.99). On review sentiment, ratings volume, update cadence and ads 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

Roll 20! costs $0.99 and PrismScroll Cthulhu $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

PrismScroll Cthulhu holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 42 and 26 respectively. Written reviews point the same way: 62% of Roll 20!'s written reviews are positive against 64% of PrismScroll Cthulhu's.

UpkeepUpdate frequency

Roll 20! ships an update every 5 weeks, PrismScroll Cthulhu every 3 weeks. Both last shipped on October 25, 2026.

Scorecard5 real differences · 6 level
Roll 20! versus PrismScroll Cthulhu: the parameters behind the verdict, then further details
ParameterRoll 20!PrismScroll Cthulhu
Price$0.99 — better$2.99
Rating3.7 (42 ratings)4.8 (26 ratings) — better
Positive reviews61.5% of reviews63.6% of reviews — better
Number of ratings42 — better26
Update frequencyEvery 5 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank#127#92 — better
DevicesiPhone, Apple WatchiPhone, iPad, iPod, Mac — better
Requires iOS17.012.0 — better
Further details — not scored
Size2 MB93 MB
Age rating4++4
DeveloperZiga PorentaSamuel Harmon

Customer experience

Roll 20!

All ratings41 ratings
Positive65.9%
Neutral9.8%
Negative24.4%
Written reviews26 reviews
Positive61.5%
Neutral11.5%
Negative26.9%

PrismScroll Cthulhu

All ratings25 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive63.6%
Neutral18.2%
Negative18.2%

In-app purchases

None

Roll 20!

No in-app purchases

None

PrismScroll Cthulhu

No in-app purchases

Questions

Is Roll 20! free?
Roll 20! costs $0.99, with no in-app purchases.
Is PrismScroll Cthulhu free?
PrismScroll Cthulhu costs $2.99, with no in-app purchases.
Which has better reviews, Roll 20! or PrismScroll Cthulhu?
PrismScroll Cthulhu is rated higher. Roll 20! averages 3.7 out of 5 from 42 ratings, while PrismScroll Cthulhu averages 4.8 from 26 ratings.
Do Roll 20! or PrismScroll Cthulhu have ads?
Neither Roll 20! nor PrismScroll Cthulhu shows ads.
Which is updated more often, Roll 20! or PrismScroll Cthulhu?
Roll 20! ships an update every 5 weeks, and PrismScroll Cthulhu every 3 weeks. Most recently, Roll 20! was updated on October 25, 2026 and PrismScroll Cthulhu on October 25, 2026.
Which is more popular, Roll 20! or PrismScroll Cthulhu?
Roll 20! currently peaks at #127 in the App Store charts, and PrismScroll Cthulhu at #92. Chart position reflects recent download velocity rather than total install base.

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