# CallTimer vs Interlo

The clearest difference is in-app purchases: CallTimer at none against Interlo's 2. CallTimer also leads on iOS requirement (15.0 vs 26.0). Interlo's advantage is ads (none vs shown) and update cadence (fortnightly vs monthly). On price and device support there is nothing between them.

Both are free to download. Interlo sells 2 in-app purchases, starting at $1.99 per month. CallTimer asks for nothing beyond the download.

CallTimer ships an update monthly, Interlo fortnightly. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | CallTimer | Interlo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/calltimer-call-timer/id1084137015/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 21.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Ad-supported | — |
| Size | 9 MB | 5 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Chunxu Qiu](https://appshunter.io/developer/1239647293) | [sugamata ryohei](https://appshunter.io/developer/6797339129) |

## What reviewers say

### CallTimer

[App page](https://appshunter.io/ios/app/calltimer-call-timer/id1084137015)

This utility app helps you monitor call durations with customizable alarms. It's designed for simplicity, allowing users to set notifications for specific call lengths, making it useful for managing unlimited calling plans.

**Highlights:** Measure call time, Set customizable alarms, Receive notifications, Vibration alerts, Simple interface, Select numbers from phone book

**Features:** Vision Pro support

**In-app purchases:** none


### Interlo

[App page](https://appshunter.io/ios/app/interlo-offline-translator/id6797339127)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Interlo Pro（月額） | $1.99 | per month |
| Interlo Pro（買い切り） | $9.99 | one-time |


## Frequently asked questions

### Is CallTimer free?

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

### Is Interlo free?

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

### Do CallTimer or Interlo have ads?

CallTimer shows ads; Interlo does not.

### Which is updated more often, CallTimer or Interlo?

CallTimer ships an update monthly, and Interlo fortnightly. Most recently, CallTimer was updated on October 16, 2026 and Interlo on October 17, 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.*