Arbitrary Triangle PRO vs TwoPartSaying
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Arbitrary Triangle PRO
This app calculates all unknown quantities of an arbitrary triangle. It displays the formulas used and provides step-by-step solutions, supporting decimals and fractions. Calculations are saved in history and can be shared.
- Calculates all triangle quantities
- Displays formulas used
- Step-by-step solutions
- Supports decimals and fractions
- Calculation history
- Shareable solutions
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The best app to calculate all quantities of an arbitrary triangle. You must enter some quantities like two angles and one length. The algorithm searches the formulas of the missing quantities, shows them and calculates the results. The length of the decimal place can be changed. The algorithm shows when rounding or wrong values lead to an opposition. Decimals and fractions are supported. The solution is shown step by step. All calculations are stored in the history. The final solution can be shared. [ Contents ] - all important quantities for the arbitrary triangle - formulas for all important quantities of an arbitrary triangle - infographic to illustrate the topic - search bar to find the desired quantity - history function to save the input - detailed solution - positive numbers, decimals and fractions are supported - no ads! [ Usage ] - there are fields for entering values using a special keyboard - press the check mark button at the bottom right to start the calculation - if values are missing, all fields will be marked orange - if the values are wrong (e.g. negative lengths), the affected field will be highlighted red - if a value is no number, it is highlighted in red - the entries in the history can be deleted or sorted - if you select an entry in the history, it will be automatically loaded for the calculation - the whole history can be deleted by pressing a button - solutions can be shared [ Math conditions ] - each value must be greater than zero - each angle must be less than 180° - the sum of two sides must always be greater than the length of the third side
TwoPartSaying
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- Favorite allegorical sayings are automatically synchronized to your private iCloud storage - Only when you answer the question in real combat can you remember it, and the wrong answer will be automatically saved to your favorites - Support the quick search of allegorical sayings, and enter any keyword of the question or answer to search
Screenshots
Verdict
The clearest difference is price: TwoPartSaying at Free against Arbitrary Triangle PRO's $2.99. Arbitrary Triangle PRO's advantage is in-app purchases (none vs 2) and ads (none vs shown). On iOS requirement 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
TwoPartSaying is free to download; Arbitrary Triangle PRO costs $2.99 up front. TwoPartSaying sells 2 one-off in-app purchases. Arbitrary Triangle PRO asks for nothing beyond the download.
Arbitrary Triangle PRO ships an update every 3 weeks, TwoPartSaying every 4 months. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.
| Parameter | Arbitrary Triangle PRO | TwoPartSaying |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 182 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Glindemann, Sennoun, Langer GbR | 德明 杨 |
In-app purchases
Arbitrary Triangle PRO
No in-app purchases
TwoPartSaying
- Donate$0.99
- Buy Pro Version$0.99
Questions
Is Arbitrary Triangle PRO free?
Is TwoPartSaying free?
Do Arbitrary Triangle PRO or TwoPartSaying have ads?
Which is updated more often, Arbitrary Triangle PRO or TwoPartSaying?
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