# String search calculator vs Device Tracker

The clearest difference is in-app purchases: String search calculator at none against Device Tracker's 4. String search calculator also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (15.8.3 vs 17.0). Device Tracker's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Device Tracker sells 4 in-app purchases, starting at $4.99 per 7 days. String search calculator asks for nothing beyond the download.

String search calculator ships an update every 2 weeks, Device Tracker every 2 months. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | String search calculator | Device Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/device-tracker-find-my-device/id6756512767/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | — | Freemium |
| Size | 37 MB | 21 MB |
| Requires iOS | **15.8.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Md Manik Miah](https://appshunter.io/developer/1860816158) |

## What reviewers say

### String search calculator

[App page](https://appshunter.io/ios/app/string-search-calculator/id6502218395)

**Features:** macOS Compatibility

**In-app purchases:** none


### Device Tracker

[App page](https://appshunter.io/ios/app/device-tracker-find-my-device/id6756512767)

Quickly find lost Bluetooth devices like earbuds and smartwatches. The app uses real-time signal detection to guide you, showing proximity strength and alerting you when you're close. Simply move around and follow the distance indicator to pinpoint your item.

**Highlights:** Real-time Bluetooth device searching, Proximity distance indicator, Live sound/vibration alerts, Broad accessory compatibility, Favorite device pinning

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription | $19.99 | per year |
| Lifetime Subscription | $69.99 | one-time |


## Frequently asked questions

### Is String search calculator free?

String search calculator is free to download, with no in-app purchases.

### Is Device Tracker free?

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

### Do String search calculator or Device Tracker have ads?

String search calculator shows ads; Device Tracker does not.

### Which is updated more often, String search calculator or Device Tracker?

String search calculator ships an update every 2 weeks, and Device Tracker every 2 months. Most recently, String search calculator was updated on October 20, 2026 and Device Tracker on October 21, 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.*