# SunOnTrack vs TeklaFlow

The clearest difference is price: TeklaFlow at Free against SunOnTrack's $9.99. TeklaFlow also leads on update cadence (every 2 weeks vs every 2 months). SunOnTrack's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

TeklaFlow is free to download; SunOnTrack costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SunOnTrack ships an update every 2 months, TeklaFlow every 2 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SunOnTrack | TeklaFlow |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.6 (151 ratings)](https://appshunter.io/ios/app/sunontrack-sun-path-and-shadows/id1610305853/reviews)** | — |
| Number of ratings | **151** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 11 MB | 45 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Moder](https://appshunter.io/developer/1610305855) | [Stefan Bess](https://appshunter.io/developer/1816628463) |

## What reviewers say

### SunOnTrack

[App page](https://appshunter.io/ios/app/sunontrack-sun-path-and-shadows/id1610305853)

Plan sunlight, sun position, and shadows accurately on a map or in AR. Visualize sun paths, elevation, and shadow lengths for photography, real estate, gardening, and photovoltaics.

**Highlights:** Sun path and position calculation, Shadow simulation and length calculation, Augmented Reality (AR) visualization, Map-based planning, Sunlight amount estimation, Seasonal shadow differences

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use and intuitive
- ☀️ Accurate sun path simulation
- 💡 Useful for solar planning
- 🚀 Saves time and effort
- ✅ Works as described

**What reviewers complain about**

- 🐛 Shadows are static
- 🤔 No trial version available
- 🗺️ Outdated map data
- 🤷 No clear instructions or tutorial
- 📱 AR not working on some devices

**Reported bugs**

- Shadows are static and don’t change with time of day
- AR 3D error required sensor failed on iPhone 13 Pro
- Map is outdated
- Timeline overlaps the angle circle
- Cannot select future dates in the calendar on iPhone 13

**Requested features**

- Add wind data
- Allow account creation and sharing simulations online
- Improve precision of element placement
- Add a tutorial or user tips
- Enable future date selection in calendar


### TeklaFlow

[App page](https://appshunter.io/ios/app/teklaflow/id6790760147)

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

**In-app purchases:** none


## Frequently asked questions

### Is SunOnTrack free?

SunOnTrack costs $9.99, with no in-app purchases.

### Is TeklaFlow free?

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

### Do SunOnTrack or TeklaFlow have ads?

TeklaFlow shows ads; SunOnTrack does not.

### Which is updated more often, SunOnTrack or TeklaFlow?

SunOnTrack ships an update every 2 months, and TeklaFlow every 2 weeks. Most recently, SunOnTrack was updated on October 25, 2026 and TeklaFlow on October 24, 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.*