# Image Timer multiple timers vs SJ Chmod Calculator

The clearest difference is in-app purchases: Image Timer multiple timers at none against SJ Chmod Calculator's 5. Image Timer multiple timers also leads on ads (none vs shown). SJ Chmod Calculator's advantage is update cadence (weekly vs every 51 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. SJ Chmod Calculator sells 5 one-off in-app purchases. Image Timer multiple timers asks for nothing beyond the download.

Image Timer multiple timers ships an update every 51 months, SJ Chmod Calculator weekly. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Image Timer multiple timers | SJ Chmod Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 51 months | **Weekly** |
| Size | 427 MB | 3 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tomoki Hagano](https://appshunter.io/developer/1508301579) | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) |

## What reviewers say

### Image Timer multiple timers

[App page](https://appshunter.io/ios/app/image-timer-multiple-timers/id1508301580)

**Features:** macOS Compatibility

**In-app purchases:** none


### SJ Chmod Calculator

[App page](https://appshunter.io/ios/app/sj-chmod-calculator/id6504128434)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A coffee | $0.99 | one-time |
| A cookie | $2.99 | one-time |
| A lemon tart | $4.99 | one-time |
| No ads | $4.99 | one-time |
| A pizza | $9.99 | one-time |


## Frequently asked questions

### Is Image Timer multiple timers free?

Image Timer multiple timers is free to download, with no in-app purchases.

### Is SJ Chmod Calculator free?

SJ Chmod Calculator is free to download, with in-app purchases available.

### Do Image Timer multiple timers or SJ Chmod Calculator have ads?

SJ Chmod Calculator shows ads; Image Timer multiple timers does not.

### Which is updated more often, Image Timer multiple timers or SJ Chmod Calculator?

Image Timer multiple timers ships an update every 51 months, and SJ Chmod Calculator weekly. Most recently, Image Timer multiple timers was updated on November 7, 2026 and SJ Chmod Calculator on November 4, 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.*