QuicklyMemo vs HighDeF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QuicklyMemo
This app allows for rapid note-taking and drawing, saving your creations instantly. Share your work via email or social media platforms. Its quick startup and save features ensure immediate usability.
- Instant startup
- Quick saving
- Email sharing
- Twitter sharing
- URL scheme support
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Since it starts up quickly, you can draw immediately. Since it is saved quickly, you can write it down immediately. You can send the contents by e-mail or Twitter etc. 【URL Scheme】 jp.apptime.quicklymemo://
HighDeF
View HDF5 files on Apple devices. Browse groups and datasets, then display data as tables, plots, or images. Large files open instantly and remain responsive due to efficient loading.
- HDF5 file viewing
- Group and dataset browsing
- Data visualization (table, plot, image)
- Instant loading of large files
- Responsive performance
- Open source
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Views HDF5 files on Apple devices. Open an .h5 file and browse its groups and datasets in the sidebar, then read any dataset as a table, a plot, or an image — whichever suits the data. The app only reads the part of a dataset you are looking at, so even multi-gigabyte files open immediately and stay responsive. It is free and open source, and built on the HDF5 library.
Screenshots
Verdict
The clearest difference is ads: HighDeF at none against QuicklyMemo's shown. HighDeF also leads on update cadence (every 3 weeks vs every 5 months) and rating (5.0 vs 4.7). QuicklyMemo's advantage is ratings volume (51 vs 1) and iOS requirement (15.0 vs 26.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
HighDeF holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: QuicklyMemo has 51 ratings behind it against 1, so its average is the more settled of the two.
QuicklyMemo ships an update every 5 months, HighDeF every 3 weeks. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.
| Parameter | QuicklyMemo | HighDeF |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (51 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 77.3% of reviews | — |
| Number of ratings | 51 — better | 1 |
| Update frequency | Every 5 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 4 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | EIICHI KOMINE | Twarge LLC |
Customer experience
QuicklyMemo
HighDeF
In-app purchases
QuicklyMemo
No in-app purchases
HighDeF
No in-app purchases
