# sumi vs Deckbase

The clearest difference is review sentiment: sumi at 50% against Deckbase's 0%. sumi also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.0). Deckbase's advantage is update cadence (weekly vs every 3 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. sumi sells 1 one-off in-app purchase and Deckbase sells 7 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

sumi ships an update every 3 months, Deckbase weekly. Both last shipped on November 5, 2026.

## The numbers

| Metric | sumi | Deckbase |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/sumi-quiet-flashcards/id6759393853/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 3 MB | 119 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [EDEN LOXLEY TIGER ROYE](https://appshunter.io/developer/1878403819) | [Yosuke Sakurai](https://appshunter.io/developer/1706591331) |

## What reviewers say

### sumi

[App page](https://appshunter.io/ios/app/sumi-quiet-flashcards/id6759393853)

This app offers a calm and focused approach to revision using spaced repetition. It allows users to import or create study decks and provides intelligent scheduling for optimal memory retention without distracting gamified elements.

**Highlights:** Spaced repetition with FSRS algorithm, Import Anki (.apkg), CSV, TXT, JSON decks, Offline study support, Detailed progress insights, Calm, distraction-free interface, No account or server required

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| sumi pro - lifetime | $9.99 | one-time |


### Deckbase

[App page](https://appshunter.io/ios/app/deckbase-ai-flashcard-maker/id6760248255)

Effortlessly create flashcards from PDFs, notes, or photos using AI. Study with spaced repetition, quizzes, and audio. Syncs across devices and supports Anki import/export.

**Highlights:** AI-generated flashcards from documents and photos, Spaced repetition study scheduler, Interactive quizzes, Audio playback for decks, Anki import and export, Cross-device syncing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Month | $5.99 | per month |
| Pro Month | $11.99 | per month |
| Basic Year | $59.00 | per year |
| Pro Year | $119.00 | per year |
| Starter Pack | $4.99 | one-time |
| Booster Pack | $9.99 | one-time |
| Mega Pack | $19.99 | one-time |


## Frequently asked questions

### Is sumi free?

sumi is free to download, with in-app purchases available.

### Is Deckbase free?

Deckbase is free to download, with in-app purchases available.

### Do sumi or Deckbase have ads?

Deckbase shows ads; sumi does not.

### Which is updated more often, sumi or Deckbase?

sumi ships an update every 3 months, and Deckbase weekly. Most recently, sumi was updated on November 5, 2026 and Deckbase on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*