# dnCalc vs MnemoStack

The clearest difference is in-app purchases: dnCalc at none against MnemoStack's 3. dnCalc also leads on device support (3 vs 1) and iOS requirement (11.0 vs 26.0). On price, update cadence and ads there is nothing between them.

Both are free to download. MnemoStack sells 3 in-app purchases, starting at $3.99 per month. dnCalc asks for nothing beyond the download.

dnCalc ships an update fortnightly, MnemoStack every 2 weeks. The most recent releases landed on October 13, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | dnCalc | MnemoStack |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 15 MB | 84 MB |
| Requires iOS | **11.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Devious-Monkey](https://appshunter.io/developer/388388527) | [Vincent Launay](https://appshunter.io/developer/1198218316) |

## What reviewers say

### dnCalc

[App page](https://appshunter.io/ios/app/dncalc/id1309683648)

Perform amazing mathematical "experiences" to impress friends and colleagues. This app allows you to reveal secret numbers, ages, zodiac signs, and more, all without touching a calculator. It's easy to use, requires no memorization, and can be done with your eyes closed.

**Highlights:** Reveal secret numbers, Peek at ages and zodiac signs, Calculate birth day of week, Create custom formulas, Works offline, Up to 5 participants

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

**In-app purchases:** none


### MnemoStack

[App page](https://appshunter.io/ios/app/mnemostack/id6755091634)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Xtremagic Pass | $3.99 | per month |
| Xtremagic Pass | $22.99 | per year |
| Full Access (One-Time Purchase) | $7.99 | one-time |


## Frequently asked questions

### Is dnCalc free?

dnCalc is free to download, with no in-app purchases.

### Is MnemoStack free?

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

### Do dnCalc or MnemoStack have ads?

Neither dnCalc nor MnemoStack shows ads.

### Which is updated more often, dnCalc or MnemoStack?

dnCalc ships an update fortnightly, and MnemoStack every 2 weeks. Most recently, dnCalc was updated on October 13, 2026 and MnemoStack on October 24, 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.*