# Dualock vs Date.Time Calculator

The clearest difference is price: Date.Time Calculator at $0.99 against Dualock's $1.99. Dualock's advantage is iOS requirement (12.0 vs 15.6). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Dualock costs $1.99 and Date.Time Calculator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Dualock ships an update every 4 months, Date.Time Calculator every 5 months. The most recent releases landed on October 3, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Dualock | Date.Time Calculator |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dualock-secure-note/id597531505/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | Paid | Paid |
| Size | 26 MB | 1 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gear Zero Network Inc.](https://appshunter.io/developer/1081762357) | [Noriaki HASHIBA](https://appshunter.io/developer/978336077) |

## What reviewers say

### Dualock

[App page](https://appshunter.io/ios/app/dualock-secure-note/id597531505)

This app securely stores your notes by splitting them into two encrypted parts, stored separately. Access requires authentication from two specified SNS accounts, ensuring your data remains private and inaccessible to others.

**Highlights:** Two-part encrypted note storage, Separate cloud storage for each part, Dual SNS account authentication, No password required, Secure and private data handling

**Features:** macOS Compatibility

**In-app purchases:** none


### Date.Time Calculator

[App page](https://appshunter.io/ios/app/datetime-calculator/id978336078)

Calculate date and time differences, intervals, and perform unit conversions with a pure calculator interface. Useful for determining future or past dates, calculating total time for multiple events, and converting between various time units and POSIX time.

**Highlights:** Date and time point calculations, Time interval calculations, Unit conversion of time, POSIX time interconversion, Time zone mutual conversion, Arithmetic operations with time

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

**In-app purchases:** none


## Frequently asked questions

### Is Dualock free?

Dualock costs $1.99, with no in-app purchases.

### Is Date.Time Calculator free?

Date.Time Calculator costs $0.99, with no in-app purchases.

### Do Dualock or Date.Time Calculator have ads?

Neither Dualock nor Date.Time Calculator shows ads.

### Which is updated more often, Dualock or Date.Time Calculator?

Dualock ships an update every 4 months, and Date.Time Calculator every 5 months. Most recently, Dualock was updated on October 3, 2026 and Date.Time Calculator on October 13, 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.*