# SolarMeter sun energy planner vs Interval Timer by PMak

The clearest difference is price: Interval Timer by PMak at Free against SolarMeter sun energy planner's $2.99. Interval Timer by PMak also leads on rating (5.0 vs 4.0) and update cadence (weekly vs every 8 months). SolarMeter sun energy planner's advantage is in-app purchases (none vs 1) and ratings volume (9 vs 2). On ads and device support there is nothing between them.

Interval Timer by PMak is free to download; SolarMeter sun energy planner costs $2.99 up front. Interval Timer by PMak sells 1 one-off in-app purchase. SolarMeter sun energy planner asks for nothing beyond the download.

Interval Timer by PMak holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 9 and 2 respectively.

SolarMeter sun energy planner ships an update every 8 months, Interval Timer by PMak weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | SolarMeter sun energy planner | Interval Timer by PMak |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.0 (9 ratings)](https://appshunter.io/ios/app/solarmeter-sun-energy-planner/id1047880363/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/interval-timer-by-pmak/id1575221861/reviews)** |
| Number of ratings | **9** | 2 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 46 MB | 31 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VisTech.Projects LLC](https://appshunter.io/developer/620969851) | [Petr Makarov](https://appshunter.io/developer/1833268731) |

## What reviewers say

### SolarMeter sun energy planner

[App page](https://appshunter.io/ios/app/solarmeter-sun-energy-planner/id1047880363)

Calculate, estimate, and visualize solar power and energy output for a specific location using your iPhone or iPad. This tool helps answer questions about sunlight availability, roof area needs, and potential energy bill changes after PV system installation.

**Highlights:** Real-time solar power calculation, Solar power and energy calculation for various periods, Offline statistical solar data, Automatic location search via GPS, Graph/Plot 2D data presentation, Roof tilt angle and area measurement

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

**In-app purchases:** none


### Interval Timer by PMak

[App page](https://appshunter.io/ios/app/interval-timer-by-pmak/id1575221861)

This app helps you maximize productivity and training by creating and managing custom interval timers. It features sound notifications for each interval and runs in the background for seamless multitasking. Easily duplicate intervals to save time and enhance your workout or time management sessions.

**Highlights:** Multiple timers, Variable interval durations, Voice and sound notifications, Interval copying, Background operation, Push notifications

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $2.99 | one-time |


## Frequently asked questions

### Is SolarMeter sun energy planner free?

SolarMeter sun energy planner costs $2.99, with no in-app purchases.

### Is Interval Timer by PMak free?

Interval Timer by PMak is free to download, with in-app purchases available.

### Which has better reviews, SolarMeter sun energy planner or Interval Timer by PMak?

Interval Timer by PMak is rated higher. SolarMeter sun energy planner averages 4.0 out of 5 from 9 ratings, while Interval Timer by PMak averages 5.0 from 2 ratings.

### Do SolarMeter sun energy planner or Interval Timer by PMak have ads?

Neither SolarMeter sun energy planner nor Interval Timer by PMak shows ads.

### Which is updated more often, SolarMeter sun energy planner or Interval Timer by PMak?

SolarMeter sun energy planner ships an update every 8 months, and Interval Timer by PMak weekly. Most recently, SolarMeter sun energy planner was updated on October 24, 2026 and Interval Timer by PMak on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*