# CalSyncAlert vs TechRef

The clearest difference is update cadence: TechRef at every 3 days against CalSyncAlert's every 2 weeks. TechRef also leads on iOS requirement (17.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CalSyncAlert sells 2 in-app purchases, starting at $0.99 per month and TechRef sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CalSyncAlert ships an update every 2 weeks, TechRef every 3 days. The most recent releases landed on October 19, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | CalSyncAlert | TechRef |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/calsyncalert-calendar-alarm/id6756097650/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 4 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [kosuke konuma](https://appshunter.io/developer/1767116232) | [MASARU KATO](https://appshunter.io/developer/1883480774) |

## What reviewers say

### CalSyncAlert

[App page](https://appshunter.io/ios/app/calsyncalert-calendar-alarm/id6756097650)

This app ensures you never miss important calendar events by converting them into unignorable, full-screen alarms. It syncs automatically with your existing calendars and offers customizable alert options for a more reliable reminder system than standard notifications.

**Highlights:** Automatic alarm sync from multiple calendars, Full-screen, unmissable alerts, Smart snooze options, Multiple alarm sound choices, Home screen widget with countdown, Background sync for updated alarms, Support for recurring events

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Full Version | $7.99 | one-time |


### TechRef

[App page](https://appshunter.io/ios/app/techref/id6775818457)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TechRef Pro | $6.99 | one-time |


## Frequently asked questions

### Is CalSyncAlert free?

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

### Is TechRef free?

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

### Do CalSyncAlert or TechRef have ads?

Neither CalSyncAlert nor TechRef shows ads.

### Which is updated more often, CalSyncAlert or TechRef?

CalSyncAlert ships an update every 2 weeks, and TechRef every 3 days. Most recently, CalSyncAlert was updated on October 19, 2026 and TechRef on October 11, 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.*