Comparison

Prism Notes vs Diddit

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

Head to head
About

Prism Notes

Capture thoughts and links quickly with a familiar texting interface. Organize ideas with AI-suggested tags and develop them across linked threads. Review notes to keep what matters and easily search by keyword or meaning.

Highlights
  • Texting-like note capture
  • AI-suggested tags
  • Threaded idea development
  • Review mode for notes
  • Sync across devices
  • Natural language reminders
  • Lock screen capture
Features
Read full description

Prism is the private place for quick thoughts and links. It feels like texting, rather than writing in a document. Capture easily, organize with tags, develop ideas across threads, review to keep only what matters. Free to try! Features: - Private and on-device - Opt in to iCloud sync between iPhone and Mac - Voice transcription and voice memos - Lock screen widgets for text and voice capture - AI-suggested tags to make organizing easy or automatic AI tagging (requires apple intelligence) - Review mode to keep notes alive or let them go - Threads to evolve a thought and link them together - Search by keyword - Natural language reminders - just say "remind me tomorrow at 2pm" (requires apple intelligence)

About

Diddit

Create shared trackers for recurring life events with others. Easily log entries, view historical timelines, and manage household tasks, hobbies, or pet care. Your data is securely stored in iCloud with no third-party tracking.

Highlights
  • Create shared trackers
  • One-tap logging
  • Historical timelines
  • Private or shared groups
  • iCloud data storage
  • No third-party tracking
Features
Read full description

Keep track of the things that don't belong on a to-do list, and do it with others. Diddit allows you to create trackers, shared groups, and historical timelines for the things that recur in life. It's great for household tasks, caring for kids or pets, hobbies, and anything that requires a shared record. Your data is stored in your existing iCloud account -- there's no separate sign-up and no other server involved. There's also no third-party tracking, no analytics, and no metrics gathering. Start using Diddit immediately with no setup. It feels just like a built-in app. If you're comfortable with Reminders, you'll be right at home in Diddit. - Create groups to hold private or shared trackers - Add trackers for anything you want to keep track of - Use one-tap logging to easily add an entry to any trackers - Include a note if you need to refer back to it - View the historical timeline of each tracker, including the time elapsed between each entry - Ask Siri when you last did something, or to log a new entry in a tracker Diddit is made in New York City by an independent developer. -- Terms of Use https://didditapp.com/terms

Screenshots

Prism Notes4 screens
Diddit4 screens

Verdict

The call

The clearest difference is update cadence: Prism Notes at every 4 days against Diddit's monthly. Prism Notes also leads on monetization model (free vs freemium) and ratings volume (32 vs 6). On price, rating, review sentiment 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

Both are free to download. Prism Notes sells 2 one-off in-app purchases and Diddit sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Prism Notes against 5.0 for Diddit. That said, the two scores are not equally well evidenced: Prism Notes has 32 ratings behind it against 6, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Prism Notes ships an update every 4 days, Diddit monthly. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

Scorecard4 real differences · 6 level
Prism Notes versus Diddit: the parameters behind the verdict, then further details
ParameterPrism NotesDiddit
PriceFreeFree
Rating4.9 (32 ratings)5.0 (6 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings32 — better6
Update frequencyEvery 4 days — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone
Requires iOS18.618.0 — better
Further details — not scored
Size19 MB18 MB
Age rating4+4+
DeveloperTommy JosephChristopher LoSacco

Customer experience

Prism Notes

All ratings32 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews13 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Diddit

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Prism Notes

One-time2
  • Lifetime Unlock$6.99
  • Lifetime Unlock$12.99
2 purchases

Diddit

Subscriptions2
  • Diddit Plus (Monthly)$1.991 Month
  • Diddit Plus$19.991 Year

Questions

Is Prism Notes free?
Prism Notes is free to download, with in-app purchases available.
Is Diddit free?
Diddit is free to download, with in-app purchases available.
Which has better reviews, Prism Notes or Diddit?
Diddit is rated higher. Prism Notes averages 4.9 out of 5 from 32 ratings, while Diddit averages 5.0 from 6 ratings.
Do Prism Notes or Diddit have ads?
Neither Prism Notes nor Diddit shows ads.
Which is updated more often, Prism Notes or Diddit?
Prism Notes ships an update every 4 days, and Diddit monthly. Most recently, Prism Notes was updated on October 13, 2026 and Diddit on October 4, 2026.

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