# Stacks vs Flagsay

Stacks and Flagsay are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Stacks sells 2 in-app purchases, starting at $9.99 per 3 months and Flagsay sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Stacks | Flagsay |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Freemium | — |
| Size | 77 MB | 18 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lewis Hoy](https://appshunter.io/developer/1812196615) | [Shanghai Sunrise Chime Technology Co., Ltd.](https://appshunter.io/developer/1809164286) |

## What reviewers say

### Stacks

[App page](https://appshunter.io/ios/app/stacks-language-flashcards/id6745429203)

Create flashcards from your own experiences and conversations. This app uses spaced repetition to help you remember vocabulary longer with less study. It supports over 100 languages and offers offline study capabilities.

**Highlights:** Create cards from stories and conversations, Spaced repetition system (FSRS), Offline study mode, Automatic translations, Supports over 100 languages, Romanization for select scripts, Clean, minimal interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stacks+ Quarterly | $9.99 | per 3 months |
| Stacks+ Yearly | $27.99 | per year |


### Flagsay

[App page](https://appshunter.io/ios/app/flagsay-everything-speaks/id6749497690)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CaiQi Talk Pro Monthly Subscription | $2.99 | per month |
| CaiQi Talk Pro Yearly Subscription | $29.99 | per year |


## Frequently asked questions

### Is Stacks free?

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

### Is Flagsay free?

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

### Do Stacks or Flagsay have ads?

Neither Stacks nor Flagsay shows ads.

### Which is updated more often, Stacks or Flagsay?

Stacks ships an update every 3 months, and Flagsay every 3 months. Most recently, Stacks was updated on October 16, 2026 and Flagsay on October 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.*