noteSUM vs Prism
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
noteSUM
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noteSUM is an application that automatically calculates the sum of numerical values entered in a text. You can manage bank balances, total weight, total number of points, etc. by entering them all as single text without having to separate the numerical values from the note. Examples of use: - Credit card usage records - Household account book - Estimates - Salary calculation - Shopping - Pocketbook - Budget - Inventory management - Stock prices, etc. It also numbers extracted from notes are listed, and you can choose to include or exclude them from the total for each number. Other functions: - Record history of notes - Register favorite notes - Text sharing - Setting not to include the date number in the totalizer
Prism
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Most task apps make you do more. Prism helps you do less โ better. Prism is built on a simple idea: you don't have one to-do list, you have several โ work, personal, that side project โ and they shouldn't all live in the same pile. So Prism organizes everything into Task Lists, and gives each one its own Focus mode. TASK LISTS โ Create a list for each part of your life. You always have a Default list to start with, and can add up to 8 total. Rename them, reorder your tasks with a drag, and move a task from one list to another whenever priorities shift. FOCUS MODE โ Star the handful of tasks that actually matter right now, then flip Focus mode on to see just those. Each list has its own Focus limit (1โ10), so "focused" means something different for a big project list versus a quick errands list. RECURRING LISTS โ For the stuff you repeat โ a weekly packing list, recurring chores โ check items off as you go, then tap Reset to start the next cycle fresh. Recurring lists don't clutter your Log with the same items week after week. LOG โ A record of what you've actually accomplished. Browse your completion history, restore a task if you archived it by mistake, and see your weekly momentum at a glance. KEY FEATURES โข Task Lists โ Organize tasks by area of your life, not one giant pile. Up to 8 lists, each with its own type and Focus limit. โข Focus mode โ Star what matters, then filter down to just that. No auto-magic guessing what you should work on โ you decide, per list. โข Recurring checklists โ Built for routines you repeat. Check off, reset, repeat. โข Smart capture โ Add multiple tasks at once by separating them with commas, "and," or line breaks. Prism splits them instantly. โข Due dates & reminders โ Pin deadlines to tasks and set push notification reminders up to 30 days in advance. โข Drag-to-reorder โ Reprioritize any list with a long-press drag, in or out of Focus mode. โข Weekly chart โ See how many tasks you've completed each day over the last week. Progress you can actually feel. โข Multiple profiles โ Switch between entirely separate sets of task lists for different areas of your life, without mixing them together. โข Dark & light modes โ A clean, minimal design that works in any light. Prism is for anyone who ends the day with more on their list than when they started โ and wants that to change. Focus on what matters.
Screenshots
Verdict
The clearest difference is in-app purchases: Prism at none against noteSUM's 3. Prism also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. noteSUM sells 3 one-off in-app purchases. Prism asks for nothing beyond the download.
noteSUM ships an update monthly, Prism every 3 weeks. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.
| Parameter | noteSUM | Prism |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 3 weeks โ better |
| Ads | Yes | No โ better |
| In-app purchases | Yes | No โ better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 โ better | 15.1 |
| Further details โ not scored | ||
| Size | 7 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Kazuhiro Sawamura | Trajectory Labs, LLC |
In-app purchases
noteSUM
- Number of History records$0.99
- Number of Favorites$0.99
- Hide Ads$2.99
Prism
No in-app purchases









