ThetaCalc vs Track Sun
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThetaCalc
This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.
- Reverse Polish Notation (RPN) calculator
- User-programmable functions
- JavaScript equation support
- Extensible functionality
Read full descriptionHide full description
ThetaCalc is a RPN (Reverse Polish Notation) calculator which can be extended by functions and equations programmed by the user in JavaScript.
Track Sun
Read full descriptionHide full description
The sun tracking can be easily achieved by connection to the Skywatcher mount.
Screenshots
Verdict
The clearest difference is iOS requirement: Track Sun at 14.0 against ThetaCalc's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ThetaCalc ships an update every 3 months, Track Sun every 5 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.
| Parameter | ThetaCalc | Track Sun |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Felix Stehli | SynUe Tech. Co., Ltd |
In-app purchases
ThetaCalc
No in-app purchases
Track Sun
No in-app purchases
