Addition Concentrated vs Portal Graph
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Addition Concentrated
Practice addition with single to five-digit numbers using two distinct methods. Offers visual customization options for accessibility and large display for classroom use.
- Addition practice
- Single to five-digit numerals
- Column-by-column method
- Multiple choice mode
- Customizable background colors
- Large numeral display
Read full descriptionHide full description
Solve addition problems of one-digit to five-digit numerals, either in the traditional right-to-left, column-by-column method; or in multiple choice mode, to select the answer from four choices. Eight background color choices including white-on-black and black-on-white, for users with mild visual impairment. Perfect for use with a classroom iPad. Numerals, as displayed on the iPad, are large enough to be seen at a distance, so it's great for a group demonstration or a challenge between teams.
Portal Graph
Read full descriptionHide full description
Graphing calculator
Screenshots
Verdict
The clearest difference is update cadence: Portal Graph at every 3 weeks against Addition Concentrated's every 25 months. Addition Concentrated's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and device support 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
Addition Concentrated costs $0.99 and Portal Graph $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Addition Concentrated ships an update every 25 months, Portal Graph every 3 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.
| Parameter | Addition Concentrated | Portal Graph |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 25 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 2 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Catherine Vitti | Seth Weinrauch |
In-app purchases
Addition Concentrated
No in-app purchases
Portal Graph
No in-app purchases
