Comparison

ThetaCalc vs SASER

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ThetaCalc

This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.

Highlights
  • Reverse Polish Notation (RPN) calculator
  • User-programmable functions
  • JavaScript equation support
  • Extensible functionality
Features
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ThetaCalc is a RPN (Reverse Polish Notation) calculator which can be extended by functions and equations programmed by the user in JavaScript.

About

SASER

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1. SASER software capable of receiving the incoming signal for VLF stations by retranslating it with internal synthesizer engine. The stronger the signal of VLF radio station, the more sound amplification it produces. The scanner of SASER software capable of switching VLF radio stations according to a set of rules for predefined monitoring. 2. Derived hyperbolic function uses up to 1536 points of distributed network service, which lowers the potential risk of DDoS by 1536 times. SASER software capable of suppressing radio stations signal with digital processors resolution of up to 192-bit. The fundamental approach of SASER software is to organize unicasting translation using digital ether from existing radio stations and if no signal is present to switch to internal digital ether generator. 3. SASER software reproduces VLF network of radio stations without physical limitations of wave propagation. The algorithm of SASER software modem works not only on a spectral level, but also on the real-time event generator level by merging three levels of operation at once.  4. You can use the signals of VLF radio stations for unicast translation. SASER software can translate incoming signals into the internal network of 1536 points. 5. You can view the system of SASER software as a solution for transport networks used in VLF radio stations. 6. The sequencer of SASER software uses approximation operations in a spherical space for playback of resulting radio signals, formed in a presence of signal constellations.

Screenshots

ThetaCalc4 screens
SASER1 screens

Verdict

The call

The clearest difference is price: ThetaCalc at Free against SASER's $7.99. SASER's advantage is update cadence (every 6 weeks vs every 3 months). On ads, in-app purchases, device support and 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

CostPrice · In-app purchases · Ads · Monetization

ThetaCalc is free to download; SASER costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ThetaCalc ships an update every 3 months, SASER every 6 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
ThetaCalc versus SASER: the parameters behind the verdict, then further details
ParameterThetaCalcSASER
PriceFree — better$7.99
Rating4.3 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS17.616.2 — better
Further details — not scored
Size1 MB3 MB
Age rating4+4+
DeveloperFelix StehliRuslan Yusipov

In-app purchases

None

ThetaCalc

No in-app purchases

None

SASER

No in-app purchases

Questions

Is ThetaCalc free?
ThetaCalc is free to download, with no in-app purchases.
Is SASER free?
SASER costs $7.99, with no in-app purchases.
Do ThetaCalc or SASER have ads?
Neither ThetaCalc nor SASER shows ads.
Which is updated more often, ThetaCalc or SASER?
ThetaCalc ships an update every 3 months, and SASER every 6 weeks. Most recently, ThetaCalc was updated on October 29, 2026 and SASER on October 30, 2026.

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