Prism Notes vs Diddit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Texting-like note capture
- AI-suggested tags
- Threaded idea development
- Review mode for notes
- Sync across devices
- Natural language reminders
- Lock screen capture
Read full descriptionHide 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)
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.
- Create shared trackers
- One-tap logging
- Historical timelines
- Private or shared groups
- iCloud data storage
- No third-party tracking
Read full descriptionHide 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
Verdict
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
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.
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.
Prism Notes ships an update every 4 days, Diddit monthly. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.
| Parameter | Prism Notes | Diddit |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (32 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 32 — better | 6 |
| Update frequency | Every 4 days — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone |
| Requires iOS | 18.6 | 18.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Tommy Joseph | Christopher LoSacco |
Customer experience
Prism Notes
Diddit
In-app purchases
Prism Notes
- Lifetime Unlock$6.99
- Lifetime Unlock$12.99
Diddit
- Diddit Plus (Monthly)$1.991 Month
- Diddit Plus$19.991 Year









