# Periodic Timer + Custom Sounds vs Wobble Rowing

The clearest difference is review sentiment: Wobble Rowing at 100% against Periodic Timer + Custom Sounds's 55%. Wobble Rowing also leads on price (Free vs $4.99) and rating (5.0 vs 3.9). Periodic Timer + Custom Sounds's advantage is ratings volume (76 vs 2). On update cadence, ads, monetization model and device support there is nothing between them.

Wobble Rowing is free to download; Periodic Timer + Custom Sounds costs $4.99 up front. Periodic Timer + Custom Sounds sells 3 one-off in-app purchases. Wobble Rowing asks for nothing beyond the download.

Wobble Rowing holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Periodic Timer + Custom Sounds has 76 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 55% of Periodic Timer + Custom Sounds's written reviews are positive against 100% of Wobble Rowing's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Periodic Timer + Custom Sounds | Wobble Rowing |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [3.9 (76 ratings)](https://appshunter.io/ios/app/periodic-timer-plus-custom-sounds/id1175807581/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/wobble-rowing/id6762370650/reviews)** |
| Number of ratings | **76** | 2 |
| Positive reviews | 54.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 17 MB | 0 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vladimir Kelin](https://appshunter.io/developer/933241655) | [William North](https://appshunter.io/developer/1893958270) |

## What reviewers say

### Periodic Timer + Custom Sounds

[App page](https://appshunter.io/ios/app/periodic-timer-plus-custom-sounds/id1175807581)

This app provides a simple, repeating interval timer that works in the background. It offers customizable sounds, vibration, and flexible output modes for various activities like fitness, cooking, and learning. The interface is designed to be minimalist and distraction-free.

**Highlights:** Repeating interval timer, Customizable sounds and vibration, Works in the background, Long intervals up to 99 hours, Multiple timer output modes, Shake to start functionality

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip a Banana | $0.99 | one-time |
| Tip a Coffee | $3.99 | one-time |
| Donate: Bust the project! | $9.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 👍 Perfect for workouts
- 👍 No ads, no nonsense
- 👍 Good app, like it
- 👍 Very practical

**What reviewers complain about**

- 😩 Nagging to write reviews
- 😩 Doesn't work in background
- 😩 Not loud enough
- 😩 Vibration too short
- 😩 Paid version lacks features

**Reported bugs**

- Doesn't work in background
- Timer doesn't work for over 59 minutes on watch
- Custom alert audio not working
- Alarm not working after payment
- App doesn't open

**Requested features**

- More sound options
- Ability to set alarm for a time of day
- Explanation for changing display mode
- Simultaneous timers
- Ability to set start/end times and weekdays


### Wobble Rowing

[App page](https://appshunter.io/ios/app/wobble-rowing/id6762370650)

This app measures the stability of your rowing shell in real-time, calculating a "Wobble Factor" to help you improve your technique. It also tracks stroke rate and pace, providing per-minute summaries and saving detailed data for analysis.

**Highlights:** Measures shell stability (Wobble Factor), Tracks stroke rate (SPM), Monitors pace (min/500m), Real-time data capture, Per-minute session summaries, CSV data export for analysis

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Periodic Timer + Custom Sounds free?

Periodic Timer + Custom Sounds costs $4.99, and also offers in-app purchases.

### Is Wobble Rowing free?

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

### Which has better reviews, Periodic Timer + Custom Sounds or Wobble Rowing?

Wobble Rowing is rated higher. Periodic Timer + Custom Sounds averages 3.9 out of 5 from 76 ratings, while Wobble Rowing averages 5.0 from 2 ratings.

### Do Periodic Timer + Custom Sounds or Wobble Rowing have ads?

Neither Periodic Timer + Custom Sounds nor Wobble Rowing shows ads.

### Which is updated more often, Periodic Timer + Custom Sounds or Wobble Rowing?

Periodic Timer + Custom Sounds ships an update every 2 months, and Wobble Rowing every 2 months. Most recently, Periodic Timer + Custom Sounds was updated on November 6, 2026 and Wobble Rowing on November 5, 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.*