# SimpleSigma+ vs Schedule Clock

The clearest difference is price: Schedule Clock at Free against SimpleSigma+'s $3.99. SimpleSigma+'s advantage is update cadence (every 3 weeks vs every 2 months). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Schedule Clock is free to download; SimpleSigma+ costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SimpleSigma+ ships an update every 3 weeks, Schedule Clock every 2 months. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | SimpleSigma+ | Schedule Clock |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 1 MB | 1 MB |
| Requires iOS | 17.1 | **16.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [MUTSUAKI KIKUCHI](https://appshunter.io/developer/1874283283) | [Taiyo Koshiba](https://appshunter.io/developer/1687457132) |

## What reviewers say

### SimpleSigma+

[App page](https://appshunter.io/ios/app/simplesigma-plus/id1522991950)

This app simplifies numerical tabulation with three distinct spreadsheet types for various calculation needs. It offers quick data input, immediate recalculation, and convenient features like CSV import/export and tax settings.

**Highlights:** Three spreadsheet types (Simple, Duplex, Shopping), Quick data input and immediate recalculation, Swipeable keyboard for cell navigation, Customizable consumption tax settings, Save and reuse calculation data, CSV data import and export

**Features:** macOS Compatibility

**In-app purchases:** none


### Schedule Clock

[App page](https://appshunter.io/ios/app/schedule-clock/id6741460284)

This app combines an analog clock, a digital clock, and schedule management on a single screen. It helps you stay on time and organized by displaying current time and upcoming events.

**Highlights:** Analog clock display, Digital clock display, Schedule management (up to 5 events), Automatic time sorting, Swipe to delete events, Automatic layout optimization, Multi-language support

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

**In-app purchases:** none


## Frequently asked questions

### Is SimpleSigma+ free?

SimpleSigma+ costs $3.99, with no in-app purchases.

### Is Schedule Clock free?

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

### Do SimpleSigma+ or Schedule Clock have ads?

Neither SimpleSigma+ nor Schedule Clock shows ads.

### Which is updated more often, SimpleSigma+ or Schedule Clock?

SimpleSigma+ ships an update every 3 weeks, and Schedule Clock every 2 months. Most recently, SimpleSigma+ was updated on October 7, 2026 and Schedule Clock on September 30, 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.*