Comparison

Prysm AI vs Tertiary Planner

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

Head to head
About

Prysm AI

Features
Read full description

Prysm AI brings the power of advanced language models directly to your Apple devices, with a focus on privacy, performance, and ease of use. KEY FEATURES: ā— Private & Secure All processing happens on-device using Apple's Foundation Models framework. Your conversations never leave your device, ensuring complete privacy. ā— Smart Conversations Engage in natural, contextual conversations with an AI that understands nuance and can help with a wide variety of tasks. ā— Creative Tools Generate structured content including recipes, travel itineraries, book summaries, and product reviews with specialized templates. ā— Adaptive Interface Beautiful, native experience optimized for iPhone, iPad, and Mac with support for light/dark modes and customizable themes. ā— No Subscription Required Core features are completely free with no ads or tracking. Optional premium features enhance your experience. ā— Examples Library Get inspired with curated prompts and templates across categories like productivity, creativity, learning, and entertainment. PERFECT FOR: • Students and educators • Writers and content creators • Developers and designers • Business professionals • Anyone curious about AI Prysm AI respects your privacy while delivering powerful AI capabilities. No account required, no data collection, just pure AI assistance when you need it. Built with SwiftUI and powered by Apple Intelligence, Prysm AI represents the future of on-device AI assistance.

About

Tertiary Planner

Features
Read full description

Tertiary Planner is a fast, private to-do and planner app for iPhone, iPad and Mac. Type or speak what you need — "Lunch with Sam tomorrow at 1pm" — and the on-device assistant words it nicely and saves it as an appointment or a to-do, straight into your list. On supported devices it uses Apple Intelligence, running entirely ON DEVICE, to understand your intent and word your items clearly. On other devices the same on-device parsing (Apple's Natural Language and Speech frameworks) does the job. Either way, nothing you type or say ever leaves your device to any third party. FEATURES • One Planner page with To-Do and Appointment tabs, each filterable by your lists • Capture bar at the bottom — type or dictate, and the assistant drafts and saves the entry; Undo reverts it • Apple Intelligence on-device intent understanding (with an on-device fallback) • Voice capture using native iOS speech recognition • Your own lists and sub-lists — create, rename, pin, reorder and nest them • Assign items to people; items added in someone's list go to that person • To-Do priorities — Critical, High, Medium or Low; Critical and High are pinned automatically • Pin anything to the top; drag to rearrange everything by hand • Smart views: All Tasks, Pinned, Today and Upcoming show your own queue • Upcoming — everything with a date, broken down by day, with anything overdue on top • Calendar — a month view with each day's appointments written into the day, plus a List view • Meeting links — paste a Google Meet, Zoom or Teams link and tap Join on the appointment • Singapore public holidays marked on the calendar • Today's appointments — a morning summary and an alert just before each appointment starts • Advance reminders — a notification before anything with a date is due (1, 3 or 7 days ahead) • Optional mirror of appointments into your system Calendar (EventKit only) • Search across titles, notes, assignee and list names • Duplicate check — spots the same title on the same day and offers to archive the extras • Check off an item and it is automatically archived; restore anytime • iCloud sync — your items stay up to date on every device signed in to your iCloud • Light, Dark or System appearance, with a choice of accent colours PRIVACY Your data belongs to you. All intelligence runs on your device. Items are stored on your device and synced only through your personal, private iCloud database, which only you can access — we never see your data. No third-party AI services, no accounts, no tracking. Developed by Tertiary Infotech Academy Pte Ltd.

Screenshots

Prysm AI4 screens
Tertiary Planner3 screens

Verdict

The call

The clearest difference is iOS requirement: Tertiary Planner at 17.0 against Prysm AI's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on November 5, 2026 and November 11, 2026 respectively.

Scorecard1 real difference Ā· 5 level
Prysm AI versus Tertiary Planner: the parameters behind the verdict, then further details
ParameterPrysm AITertiary Planner
PriceFreeFree
Update frequencyEvery 2 daysEvery 2 days
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017.0 — better
Further details — not scored
Size2 MB2 MB
Age rating4+4+
DeveloperAndrew BiermanAlfred Ang

In-app purchases

None

Prysm AI

No in-app purchases

None

Tertiary Planner

No in-app purchases

Questions

Is Prysm AI free?
Prysm AI is free to download, with no in-app purchases.
Is Tertiary Planner free?
Tertiary Planner is free to download, with no in-app purchases.
Do Prysm AI or Tertiary Planner have ads?
Neither Prysm AI nor Tertiary Planner shows ads.
Which is updated more often, Prysm AI or Tertiary Planner?
Prysm AI ships an update every 2 days, and Tertiary Planner every 2 days. Most recently, Prysm AI was updated on November 5, 2026 and Tertiary Planner on November 11, 2026.

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